8. REFERENCES

References

• Able , K. P. 1973 . The role of weather variables and flight direction in determining the magnitude of nocturnal bird migration . Ecology , 54 : 1031 – 1041 .
   Web of Science ®Google Scholar
• Able , K. P. 1974 . Environmental influences on the orientation of free flying nocturnal bird migrants . Anim. Behav. , 22 : 224 – 238 .
   Web of Science ®Google Scholar
• Able , K. P. 1982 . Field studies of avian nocturnal migratory orientation . I. Interaction of sun, wind and stars as directional cues. Anim. Behav. , 30 : 761 – 767 .
   Google Scholar
• Able , K. P. and Gauthreaux , S . 1975 . Quantification of nocturnal passerine migration with a portable ceilometer . Condor , 77 : 92 – 96 . Jr.
   Web of Science ®Google Scholar
• Aleknonis , A. 1977 . Bird spring arrival to the environs of Lekėčiai in 1959–1974. Ecology ofbirds of Lithuania, Vilnius 114 – 119 . (in Russian).
   Google Scholar
• Alerstam , T. 1976 . Nocturnal migration of thrushes (Turdus sp.) in southern Sweden. . Oikos , 27 : 457 – 475 .
   Web of Science ®Google Scholar
• Alerstam , T. 1978 . Analysis and theory of visible bird migration . Oikos , 30 : 273 – 349 .
   Web of Science ®Google Scholar
• Alerstam , T. 1979 . Optimal use of wind by migrating birds: combined drift and overcompensation . J.Theor. Biol. , 79 : 341 – 353 .
   PubMed Web of Science ®Google Scholar
• Alerstam , T. 1981 . The course and timing of bird migration. Animal migration. Ed.: D.Aidley, Cambridge 9 – 54 .
   Google Scholar
• Alerstam , T. and Ulfstrand , G. 1972 . Radar and field observations of diurnal bird migration in south Sweden, autumn 1971 . Ornis Scand , 3 : 99 – 139 .
   Google Scholar
• Ašmontas , A. 1995 . Climate and hydrometeorological regime. The Būtingė Oil terminal. Ed.: L.Lazauskienė, Vilnius 24 – 34 .
   Google Scholar
• Baker , R. R. 1984 . Hodder & Stoughton . Bird Navigation: the Solution of a Mystery?
   Google Scholar
• Balčiauskas , L. 1984 . Software for microcomputer “Electronica BZ-34”. Programs for processing biological data. 82 p. (in Russian).
   Google Scholar
• Balčiauskas , L. and Žalakevičius , M. 1987 . The accuracy of methods for studying bird migration. The Study of Nocturnal Autumnal Migration of Birds in the Dispersed Electric Light of Greenhouses. Vilnius, Mokslas 99 – 112 . (in Russian).
   Google Scholar
• Balčiauskas , L. and Žalakevičius , M. 1991 . Accuracy of methods for the study of nocturnal migration . Acta Ornith. Lit. , 4 : 39 – 51 .
   Google Scholar
• Balcomb , R. 1977 . The grouping of nocturnal passerine migrants . Auk. , 95 : 479 – 488 .
   Google Scholar
• Baldassarre , G. A. , Whyte , R. J. , Quinlan , E. E. and Bolen , E. G. 1983 . Dynamics and quality of waste corn, available to postbreeding waterfowl in Texas . Wild Soc. Bull , 11 : 25 – 31 .
   Google Scholar
• Baldassarre , G. A. and Bolen , E. G. 1984 . Field-feeding ecology of waterfowl on the Southern High Plains of Texas . J. Wildl. Manage. , 48 : 63 – 71 . (1)
   Web of Science ®Google Scholar
• Batschelet , E. 1981 . Circular statistics in biology. Academic Press, London, p.371.
   Google Scholar
• Baumanis , Y. , Bolshakov , K. Lapshin , N . 1979 . Nocturnal migration of birds in 6 points of “White—Baltic Sea passage” in September 1975. Population dynamics and behaviour of vertebrates in the Latvian SSR, Riga 50 – 73 . (in Russian).
   Google Scholar
• Beklova , M. , Picula , J. and Šabatka , L. 1983 . Supplement to phenological maps of bird migration . Acta Sc. Nat. Bmo , 17 : 1 – 53 . (5), p.
   Google Scholar
• Bellrose , F. 1971 . The distribution of nocturnal migrants in the air space . Auk , 88 : 397 – 424 .
   Web of Science ®Google Scholar
• Bergman , G. and Donner , K. O. 1964 . An analysis of the spring migration of the Common Scoter and the Long-tailed Duck in Southern Finland . Acta Zool Fenn , 105 : 1 – 59 .
   Google Scholar
• Bergman , G. 1978 . Effects of wind conditions of the autumn migration of waterfowl between the White Sea area and the Baltic region . Oikos , 30 : 393 – 397 .
   Web of Science ®Google Scholar
• Berthold , P. 1971 . “ Grundress des Vogelzugskunde ” . In Physiologie des Vogelzugs Edited by: Schuz , E. 257 – 299 . Berlin-Hamburg : Paul Parey Verl. .
   Google Scholar
• Berthold , P. 1975 . Avian biology Edited by: Famer , D. S. and King , J. R. Vol. 5 , 77 – 128 . Migration: control and metabolic physiology. Ed.:. Academic Press, N.Y.
   Google Scholar
• Berthold , P. 1984 . The endogenous control of bird migration: a survey of experimental evidence . Bird Study , 31 : 19 – 27 .
   Web of Science ®Google Scholar
• Berthold , P. 1990 . Spatiotemporal programs and genetics of orientation . Experientia , 46 : 363 – 371 .
   Google Scholar
• Bianki , V. 1993 . Ecology of birds of the White Sea. Doctoral Thesis, St. Petersburg 40 (in Russian).
   Google Scholar
• Blockpoel , H. and Burton , J. 1975 . Weather and height of nocturnal migration in east-central Alberta: a radar study . Bird—Banding , 4 : 311 – 328 . b
   Google Scholar
• Blum , P. N. 1973 . 155 The Coot in Latvia, Riga, pp. (in Russian).
   Google Scholar
• Bolshakov , K. 1974 . Social behaviour of birds during nocturnal migration. Proc. Conf. on the study of Migration and Protection of Birds of the Baltic Basin. Tartu 8 – 10 . (in Russian).
   Google Scholar
• Bolshakov , K. 1976 . The study of spring nocturnal migration of birds in the eastern part of the Gulf of Finland. Cand. of Biol.Sc. Thesis. Leningrad 22 (in Russian).
   Google Scholar
• Bolshakov , K. 1977 . The study of nocturnal bird migration (methodical aspect). Methods of Studying Bird Migrations, Moscow 77 – 96 . (in Russian).
   Google Scholar
• Bolshakov , K. 1981 . Reconstruction of a full picture of nocturnal migration and the effectiveness of detecting it by different methods. Methods of Detecting and Registering Bird Migrations, Leningrad 95 – 123 . (in Russian).
   Google Scholar
• Bolshakov , K. 1985 . The moon-watching method in quantitative evaluation of nocturnal bird migration (gathering, processing and analysis of the data). Spring Nocturnal Migration of Birds over Arid and Mountainous Space in Middle Asia and Kazakhstan, Leningrad 14 – 36 . (in Russian).
   Google Scholar
• Bolshakov , K. and Rezvyj , G. 1976 . An analysis of prestart and start activity of Robin during spring night migration. Proc. Baltic Commission for bird Migration. Tartu, No 10. 119 – 134 . (in Russ).
   Google Scholar
• Bolshakov , K. and Buliuk , V. 1978 . The method of the illuminated area and its possibilities in the study of nocturnal bird migration. Proc.of the Conf. on Bird Migration. Part 2. Alma-Ata 177 – 179 . (in Russian).
   Google Scholar
• Bolshakov , K. , Buliuk , V. Žalakevičius , M . 1981 . Comparison of the results of the counts of nocturnal migration of birds in autumn 1977 in the Kuršių Spil by seven methods of observation. Methods of Detecting and Registering Bird Migrations, Leningrad 79 – 95 . (in Russian).
   Google Scholar
• Bruderer , B. 1971 . Radarbeobachtungen uber den Fruhlingszung in Schweizerichen Mitteland . Der Ornithol. Beobachter , 68 : 89 – 158 .
   Google Scholar
• Bruderer , B. and Steidinger , P. 1972 . Methods of quantitative and qualitative analysis of bird migration with a tracking radar . NASA SP , 262 : 151 – 167 .
   Google Scholar
• Bruderer , B. 1977 . Weather-dependence of height, density and direction of migration in Switzerland. Proc. 12-th Bird Strike Commit. Europe, Paris, WP-25.
   Google Scholar
• Buliuk , V. 1984 . Nocturnal migration of birds over the Kara Kum desert. Cand. of Biol. Sc. Thesis, Leningrad, 21pp. (in Russian).
   Google Scholar
• Camphuysen , C. 1989 . Beached Bird Surveys in the Netherlands 1915–1988. Techn. Rapport Vogelbeschenning 1, Amsterdam 322
   Google Scholar
• Camphuysen , C. and Franeker , J. 1992 . The value of beached bird surveys in monitoring marine oil pollution 191
   Google Scholar
• Camphuysen , C. J. 1994 . Consumption of discards by seabirds in the North Sea. EC Project BIOECO/93/10, 2nd interim report, Oct. 1994, Netherlands Inst, for Sea Res., Texel. 55 et al.
   Google Scholar
• Camphuysen , C. J. and el al . 1995 . Consumption of discards by seabirds in the North Sea. Final Report EC DG XIV research contract BIOECO/93/10. NIOZ Rapport 1995–5. Netherlands Inst, for Sea Res., Texel. 202+LVI pp.
   Google Scholar
• Coon , N. , Caldwell , P. and Storm , G. 1976 . Some characteristics of fall migration of female Woodcock . Journ. Wildl. Manage. , 40 : 91 – 95 .
   Web of Science ®Google Scholar
• Cramp , S. and Simmons , K. , eds. 1977 . The birds of the Western Palearctic Vol. 1 , Oxford Univ. Press.
   Google Scholar
• Crowder , A. and Brestow , M. 1988 . The future of waterfowl habitats in the Canadian lower Great lakes wetlands . J. Great lakes Res. , 14 : 115 – 127 .
   Web of Science ®Google Scholar
• Daniel , K. and Sjoberg , K. 1980 . Foods of Wigeon, Teal, Mallard and Pintail during the summer in a Northern Swedish lake . Swedish Wildlife Research , 118 : 139 – 167 .
   Google Scholar
• Dierschke , V. 1989 . Automatisch—akustische Erfassung des nachtlichen Vogelzuges bei Helgoland im Sommer 1987 . Vogelwarte , 35 : 115 – 131 .
   Google Scholar
• Dolnik , V. 1975 . Migratory state of birds. Moscow, Nauka 398 (in Russian).
   Google Scholar
• Dolnik , V. 1981 . “Experiment” programme: comparison of methods for observation of bird flight. Methods of detecting and registering bird migrations. Proc. of the Zool . Inst., Leningrad , 104 : 45 – 50 . (in Russian).
   Google Scholar
• Dolnik , V. and Bolshakov , K. 1985 . A preliminary picture of spring nocturnal migration of birds in arid mountainous regions of Middle Asia and Kazakhstan (“a latitudinal section”). Spring Nocturnal Migration of Birds over Arid and Mountainous Space of Middle Asia and Kazakhstan, Leningrad 260 – 294 . (in Russian).
   Google Scholar
• Dolnik , V. , ed. 1985 . Spring nocturnal bird passage over arid and mountain areas of Middle Asia and Kazakhstan. Zool. Inst., USSR Acad. Sci., Leningrad 3 – 13 . (in Russian).
   Google Scholar
• Drost , R. 1960 . Über den nächtlingen Vogelzug auf Helgoland . Proc. 12 Int. Ornith. Congr., Helsinki , 1958 : 178 – 192 .
   Google Scholar
• Durinck , J. , Skov , H. , Jensen , F. P. and Pihl , S. 1994 . Important marine areas for wintering birds in the Baltic Sea. Ornis Consult Report 1994 110
   Google Scholar
• Durman , R. 1976 . 29 – 46 . Bird observations in Britain and Ireland
   Google Scholar
• Eastwood , E. 1967 . Radar Ornithology. Methuen. CO LTD. New fetter lane, London EC4 278
   Google Scholar
• Eastwood , E. and Rider , C. C. 1966 . Grouping of nocturnal migrants . Nature , 211 : 1143 – 1146 .
   Web of Science ®Google Scholar
• Emlen , S. T. 1967 . Migratory orientation in the Indigo Bunting . Passerina cyanea. , 84 : 309 – 312 . 1. The evidence for celestial cues. Auk
   Google Scholar
• Erikson , M. O.G. 1983 . The role of fish in the selection of lakes by nonpiscivorous ducks: Mallard, Teal and Goldeneye . Wildfowl , 34 : 27 – 32 .
   Google Scholar
• Evans , M. 1979 . The effects of weather on the wintering of Bewick's Swans in Slimbridge, England . Ornis Scand. , 124–132
   Google Scholar
• Evans , P. R. 1985 . Migration Edited by: Campbell , B. , Lack , E. and Poyser , A. D. 348 – 353 . A Dictionary of Birds. Eds.: p.
   Google Scholar
• Farner , D. S. 1955 . The annual stimulus for migration: experimental and physiologic aspects Edited by: Wolfson , A. 198 – 237 . Univ. Illinois Press . Recent studies in avian biology. Ed.:, p.
   Google Scholar
• Gaigalienė , D. 1980 . 232 – 241 . Waterfowl and their Ecology in the Lithuanian SSR, Vilnius, (in Russian).
   Google Scholar
• Garunkštis , A. and Stanaitis , A. 1969 . 159 Lakes appear, develop and die, Vilnius, pp. (in Lithuanian).
   Google Scholar
• Gasiūnas , J. 1961 . Baltic Sea benthic animals at the Lithuanian coast. Proc. Lit. Acad. Sci., Ser. Biol. 129 – 142 . (in Lithuanian).
   Google Scholar
• Gauer , E. G.F. and Gauer , E. M. 1955 . Zur Fragl der nachtlichen Zugorientierung von Grasmucken . Rev. Suisse Zool. , 62 : 250 – 259 .
   Google Scholar
• Gauthreaux , S. A. Jr. 1969 . A portable ceilometer technique for studying low-level nocturnal migration . Bird Banding , 40 : 309 – 320 .
   Google Scholar
• Gauthreaux , S. A. Jr. 1971 . A radar and direct visual study of passerine spring migration in southern Louisiana . Auk , 88 : 343 – 365 .
   Web of Science ®Google Scholar
• Gauthreaux , S. A. Jr. 1972 . Behavioural responses of migrating birds to daylight and darkness: A radar and direct visual study . Wilson Bull. , 84 : 136 – 148 .
   Google Scholar
• Gauthreaux , S. A. Jr. 1976 . The influence of weather variables on the density of nocturnal migration in spring. Paper 94-th Annu. Meet Amer. Ornith. Union, 9–13 Aug. 1976, Maverford, Pennsylvania.
   Google Scholar
• Gauthreaux , S. A. Jr. 1977 . The influence of weather variables on the density of nocturnal migration in spring. Proc. 12-th Bird Strike Commit. Europe, Paris, WP-28.
   Google Scholar
• Gehring , W. 1963 . Radar—und Feldbeobachtungen über den Verlauf des Vogelzuges im Schweizerischen Mittelland: Der Tagzug im Herbst (1957–1961) . Orn. Beob. , 60 : 35 – 68 .
   Google Scholar
• Geil , S. , Noer , H. and Rabøl , I. 1974 . Forecast for bird migration in Denmark. Bird Strike Commit. Denmark, R. Dan. Air Force.
   Google Scholar
• Geraudet , P. 1985 . Les oiseaux d'eau en Suisse romarde et secteurs limithopes mi-janvier 1985 (32-e recensement) . Nos oiseaux , 38 : 179 – 184 . No 4
   Google Scholar
• Blotzlicim , Glutz von . 1983 . Urs N . Avifauna im Wandel. Mitt. Naturforsch. Ges. Bern. , 40 : 101 – 113 . S.
   Google Scholar
• Gražulevičius , G. 1984 . The study of diurnal high-altitude migration of birds in the zone of the Kuršių Spit. Aviation-ornithological investigations in Lithuania, Vilnius 94 – 100 . (in Russian).
   Google Scholar
• Gražulevičius , G. 1987 . “ Study, modelling and forecasting of seasonal bird migration ” . In Bird migration in the zone of Kuršių Spit Edited by: Žalakevičius , M. 36 – 52 . Vilnius . p. (in Russian).
   Google Scholar
• Griffin , D. R. 1969 . The physiology and geophysics of birds navigation . Quart. Rev. Biol. , 44 : 255 – 276 .
   Web of Science ®Google Scholar
• Grigelis , A. 1973 . Charophyta 40 – 43 . The Charophyta algae as a substrat for the zoobenthos. The algae and its use for investigations of intracellular biological processes. Vilnius, (in Russian).
   Google Scholar
• Grigelis , A. 1977 . The fodder macrozoobenthos. Hydrobiological investigations of Lakes Dusia, Galstas, Šlavantas and Obelija, Vilnius 143 – 165 . (in Russian).
   Google Scholar
• Gruys-Casimir , E. M. 1965 . On the influence of environmental factors on the autumn migration of Chaffinch and Starling: a field study . Arch. Neerl. Zool , 16 : 175 – 279 .
   Google Scholar
• Gudelis , V . 1982 . Main regularities of the dynamics of shore zone of shallow sandy sea stripe . Proc. Lit. Acad. Sci., Ser. Biol. , 4 : 117 – 126 . (in Lithuanian).
   Google Scholar
• Guthery , F. S. , Obenlerger , S. M. and Stormer , F. A. 1984 . Prediction of site use by Ducks on the Texas High Plains . Wildl. Soc. Bull. , 12 : 35 – 40 .
   Web of Science ®Google Scholar
• Gwinner , E. 1971 . A comparative study of circannual rhythms in warblers Edited by: Menaker , E. 405 – 427 . Biochronometry. Ed.: p.
   Google Scholar
• Gwinner , E. 1972 . Endogenous timing factors in bird migration. Animal orientation and navigation, Washington. NASA, p. 321 – 338 .
   Google Scholar
• Gwinner , E. 1986 . Circannual rhythms. Springer 224
   Google Scholar
• Hamilton , W. 1962 . Evidence concerning the function of nocturnal call notes of migrating birds . Condor , 64 : 390 – 401 .
   Google Scholar
• Hamilton , W. 1967 . Social aspects of birds orientation mechanisms. Animal orientation and navigation 57 – 72 .
   Google Scholar
• Hansen , L. 1954 . Birds killed at lights in Denmark 1886–1939 . Vidensk. Medd. Dan. Naturhist. Foren , 116 : 269 – 368 .
   Google Scholar
• Harper , W. G. 1958 . Detection of bird migration by centimetric radar—a cause of radar “angels” . Proc. Roy. Soc. B , 149 : 484 – 502 .
   PubMed Web of Science ®Google Scholar
• Hassler , S. G. , Graber , R. R. and Bellrose , F. C. 1963 . Fall migration and weather: a radar study . Wilson Bull , 75 : 56 – 77 .
   Google Scholar
• Hebrard , J. J. 1971 . The nightly initiation of passerine migration in spring: a direct visual study . Ibis , 113 : 8 – 18 .
   Web of Science ®Google Scholar
• Heppner , F. 1974 . Avian flight formations . Bird Banding , 45 : 160 – 169 .
   Web of Science ®Google Scholar
• Hilden , O. and Sharrock , J. T.R. 1985 . A summary of recent Avian range changes in Europe. Acta XVIII Congressus Intemationalis ornithologicus, Moscow, vol. II 716 – 718 .
   Google Scholar
• Hilgerloch , G. 1977 . Der Einfluss ein zelner Wetterfaktoren auf den Herbstzug der Singdrossel über der Deutschen Bucht . J. Ornith. , 118 : 416 – 435 .
   Google Scholar
• Hjort , Ch . 1976 . The migration of Barnacle geese (Branta leucopsis) 165 – 174 . Tallin : Bird Migration .
   Google Scholar
• Hubalek , Z. 1983 . Cluster analysis in phenology: spring migration of birds . Vest. Čs. Společ. zool. Pralia , 47 : 161 – 168 .
   Google Scholar
• Idzelis , R. 1981 . Bird spring arrival to Vilnius and its environs . Proc. of X Baltic Ornith. Conf, Riga, part , 1 : 124 – 128 . (in Russian).
   Google Scholar
• Idzelis , R. and Gražulevičius , G. 1987 . Wintering of birds in Lithuania. Ed.: M.Žalakevičius. Study, modelling and forecasting of seasonal bird migration, Vilnius 178 – 183 . (in Russian).
   Google Scholar
• Jakobi , V. 1974 . Biological basis for avoiding aircraft-to-bird collisions. Moscow, Nauka 164
   Google Scholar
• Jakobi , V. 1976 . Light as a repellent and attractant for birds. Proc. 9 Baltic Ornith. Conf., Vilnius 287 – 288 . (in Russian).
   Google Scholar
• Jakobi , V. and Nebabin , V. 1986 . Radiolocation of birds. Methodical and practical aspects Edited by: Ilyichev , V. 112 Moscow (in Russian).
   Google Scholar
• Jakobi , V. and Žalakevičius , M. 1992 . Radar and visual surveys of the Common Scoter ( . Melanitta nigra , 5–6 : 35 – 36 . moult migration within Eastern Baltic. Acta Ornith. Lit
   Google Scholar
• Jakobi , V. 1994 . Adaptation peculiarities of true bird navigation during migration across ecological barriers . The Ring , 16 : 84 – 86 . No 1–2
   Google Scholar
• Joensen , A. H. 1974 . Waterfowl populations in Denmark 1965–1973 . Dan Rev. Game Biol. , 9
   Google Scholar
• Joyner , D. E. 1980 . Influence of invertebrates on pond selection by ducks in Ontario . J. Wildl. Manage. , 44 : 700 – 705 .
   Web of Science ®Google Scholar
• Kalindrienė , E. and Valius , M. 1977 . Ecology of birds of lake Žaltytis. Ecology of Birds of the Lithuanian SSR, Vilnius 56 – 64 . (in Russian).
   Google Scholar
• Kantrud , H. A. and Stewart , R. E. 1984 . Ecological distribution and crude density of breeding birds on prairie wetlands . J. Wildl, Manage , 43 : 426 – 437 . (2)
   Google Scholar
• Kerlinger , P. and Moore , F. R. 1989 . Atmospheric structure and avian migration. Current ornithology Edited by: Power , D. M. Vol. 6 , 109 – 142 . New York , NY : Plenum . 1989
   Google Scholar
• Kilkus , K. 1986 . 142 The lakes of Lithuanian nature reserves, Vilnius. pp. (in Lithuanian).
   Google Scholar
• Kirlys , V. 1971 . Some peculiarities of the coastal dynamics of the Kuršių Spit . Proc. Lit. Acad. Sci., Ser. Biol. , 4 : 211 – 225 . (in Russian).
   Google Scholar
• Kirlys , V. 1972 . Changes in the littoral zone of the sea in Kuršių Spit . Proc. Lit. Acad. Sci., Ser. Biol. , 6 : 203 – 210 . (in Russian).
   Google Scholar
• Kiselienė , V. and Švažas , S. 1991 . “ The effect of concentrations of ” . In Mergos merganser on formation of helminthiases foci in Kuršių Lagoon. Juodkrantė IWRB's Joint Seaduck Group Meeting, poster.
   Google Scholar
• Kumari , E. 1955 . Methods for the study of bird migration. Tartu. 28 (in Russian).
   Google Scholar
• Kumari , E. 1979 . Methods for studying visible bird migration, Tartu (in Russian).
   Google Scholar
• Kuručkin , E. and Vasiljev , V. 1966 . Some of functions of dabbling and diving birds . Zool. Journ. , 45 : 1411 – 1420 . No 9 (in Russian).
   Google Scholar
• Lack , D. 1960 . The influence of weather on passerine migration . A review. Auk. , 77 : 171 – 209 .
   Google Scholar
• Lack , D. 1962 . Migration across the southern North sea studied by radar . Part 3. Movements in June and July. Ibis , 104 : 74 – 85 .
   Google Scholar
• Lack , D. 1963a . Weather factors initiating migration. Proc. 13 Int. Ornith. Congr. 412 – 414 .
   Google Scholar
• Lack , D. 1963b . Migration across the southern North sea studied by radar. Part 5. Movements in August, winter and spring. . Ibis , 105 : 461 – 492 .
   Google Scholar
• Lazauskiene , L . 1986 . Report concerning the oil platform “D-6” construction. Bivalvia. (in Russian).
   Google Scholar
• Lazauskienė , L. , Bubinas , A. and Vaitonis , G. 1995 . Benthic communities Edited by: Lazauskienė , L. 89 – 94 . Vilnius The Būtingė Oil terminal Ed.:, p.
   Google Scholar
• Leito , A. 1989 . Ecology of Brent Goose (Branta leucopsis, Bechst.) from Barents Sea population 17 Moscow Ph. Dr. Thesis. pp. (in Russian).
   Google Scholar
• Lindgren , A. and Nilsson , S. G. 1975 . Jämförelseav fyra metoder tbr Studium av nättsträckande tättingar . Var Fagelv. , 34 : 125 – 138 .
   Google Scholar
• Liulejeva , D . 1976 . Behaviour of Swifts during summer migration on Kuršių Spit. Proc. of IX Baltic Ornith. Conf., Vilnius 148 – 152 . (in Russian).
   Google Scholar
• Liuleeva , D. , Žalakevičius , M. Shumakov , M . 1981 . Comparison of the results of diurnal bird migration in autumn 1977 in Kuršių Spit obtained by five methods of observation. Methods of observing and registering bird migrations, Leningrad 57 – 70 . (in Russian).
   Google Scholar
• Logminas , V. 1972 . 3 – 98 . Ducks, Vilnius, (in Lithuanian).
   Google Scholar
• Lowery , G. H. 1951 . A quantitative study of the nocturnal migration of birds . Univ. Kansas Publ. Mus. Nat. Hist , 3 : 361 – 472 . Jr.
   Google Scholar
• Lowery , G. H. and Newman , R. J. 1955 . Direct studies of nocturnal bird migration. Recent studies in avian biology 238 – 263 .
   Google Scholar
• Lowery , G. H. and Newman , R. I. 1966 . A continent-wide view of bird migration on four nights in October . Auk , 83 : 547 – 586 .
   Web of Science ®Google Scholar
• Maniukas , J. 1991 . The state of supply, protection and use of the near-shore fish in the Baltic Sea and Kuršių Lagoon . Geographical Chronicle , 25–26 : 202 – 210 . (in Lithuanian).
   Google Scholar
• Martin , G. 1990 . Birds by night. Poyser Ltd., London. 227
   Google Scholar
• Mečionis , R. and Jusys , V. 1994 . Harlequin Duck . Ciconia. , 2 : 125 – 126 . (in Lithuanian).
   Google Scholar
• Melnichuk , V. 1966 . Plienological data of bird spring arrival to the environs of Kiev. Ecology of vertebrates of Ukraine fauna, Kiev 153 – 155 . (in Ukrainian).
   Google Scholar
• Merkel , F. W. 1938 . Zur Physiologie der Zugunruhe bei Vogeln . Ber. Vereins schles. Ornith. , 25 S.1–72.
   Google Scholar
• Merkel , F. W. 1958a . Untersuchungen Uber tages—und jahresperiodische Änderungen im Energiehaushalt gekäftiger Zugvögel. . Ž. vergl. Physiol , 41 S.154–178.
   Google Scholar
• Merkel , F. W. 1958b . Untersuchungen zur kunstlichen Beeinflissung der Aktivitat gekaftiger . Zugvogel. Vogelwarte , 19 : 173 – 185 . S.
   Google Scholar
• Mezhennij , A. 1967 . Some peculiarities of bird migration in the Kuršių Spit according to the data of visual observation during 1959–1960. Migration of Birds of East Baltic, Leningrad 3 – 25 . (in Russian).
   Google Scholar
• Morisita , M. 1971 . Composition of the J index . Res. Popul. Ecol , 13 : 1 – 27 .
   Google Scholar
• Muller , R. E. 1976 . Effects of weather on the nocturnal activity of White-throated Sparrow . Condor , 78 : 186 – 194 .
   Web of Science ®Google Scholar
• Miller , H. 1987 . Fische Europas. Beobachten und Bestimmen. Neumann Verlag Leipzig 320
   Google Scholar
• Nedzinskas , V. 1975 . Colonies of tire Black-headed Gull in Lithuania. Colonial nesting of shore birds and their protection. Moscow 71 – 73 . (in Russian).
   Google Scholar
• Nedzinskas , V. 1980 . Gulls and tems. Ecology of Lithuanian waterfowl Edited by: Valius , M. 116 – 140 . p. (in Lithuanian).
   Google Scholar
• Nedzinskas , V. 1983 . Succession of macrophyts and status of waterfowl on lake Žuvintas. Abstr. IX Baltic Ornith. Conf., Tallin 153 – 154 . (in Russian).
   Google Scholar
• Nedzinskas , V. 1984 . Current situation of waterfowl in the Žuvintas Strict Nature Reserve. Current Situation of the Resources of Waterfowl. Proc. of Seminar. Oct. 20–23.1984. Moscow 30 – 32 . (in Russian).
   Google Scholar
• Nedzinskas , V. 1987 . The present state of avifauna in Žuvintas Strict Nature Reserve. Ecology of birds in Lithuanian SSR. Vilnius 19 – 33 . (in Russian).
   Google Scholar
• Nedzinskas , V. 1990a . “ Wildfowl ” . In Lithuanian fauna. Birds Edited by: Logminas , V. Vol. 1 , 70 – 136 . (in Lithuanian).
   Google Scholar
• Nedzinskas , V. 1990b . Numbers and distribution of the wintering Mute Swan in Lithuania. Proc. “Baltic Birds −5” Conf., Riga 34 – 36 . (in Russian).
   Google Scholar
• Nedzinskas , V. and Stanevičius , V. 1986 . Characteristics of bird migration in the environs of the Žuvintas Strict Nature Reserve. Ecology of birds of the Lithuanian SSR, Vilnius 200 – 214 . (in Russian).
   Google Scholar
• Nedzinskas , V. and Šarkinienė , I. 1987 . Vegetation of lake Žuvintas . Mūsų Gamta, No , 7 : 11 – 12 . (in Lithuanian).
   Google Scholar
• Nedzinskas , V. , Stanevičius , V. and Valius , M. 1992 . Rough survey of the changes in the number of post-breeding waterfowl on Southwest Lithuanian lakes, 1961–1986 . Acta Ornith. Lit. , 5–6 : 58 – 63 .
   Google Scholar
• Nilsson , L. 1972 . Local distribution, food choice and food consumption of diving ducks on a South Swedish lake . Oikos , 23 : 82 – 91 .
   Web of Science ®Google Scholar
• Nisbet , J. C.T. 1959 . Calculation of flight directions of birds observed crossing the face of the moon . Wilson Bull. , 71 : 237 – 243 .
   Google Scholar
• Nisbet , J. C.T. 1961 . Studying migration by moon-watching . Bird migration, No , 1 : 38 – 42 .
   Google Scholar
• Nisbet , J. C. 1963 . Quantitative study of migration with 23-centimetre radar . Ibis , 105 : 435 – 460 .
   Google Scholar
• Nisbet , J. S.T. and Drury , W. H. 1968 . Short-term effects of weather on bird migration: a field study using multivariate statistics . Anim. Behav. , 16 : 496 – 530 . Jr.
   Web of Science ®Google Scholar
• Nygard , T. , Frentzen , B. and Švažas , S. 1995 . Steller's Eider wintering in Europe: numbers, distribution and origin . Wildfowl , 46 : 140 – 155 .
   Google Scholar
• Onno , S. H. 1957 . Summer and early spring movements of some waterfowl species on the Estonian water-bodies., Proceedings of the 2-nd Baltic Ornith. Conf. 166 – 170 .
   Google Scholar
• Panek , M. and Majewski , P. 1985 . Methodical problems concerning moulting of waterfowl . Notatici ornitologyczne , 26 : 201 – 207 . No 3–4
   Google Scholar
• Palmgren , P. 1937 . Auslösung der Frühlings—Zugunruhe durch Wärme bei gekäligten Rotkehlchen, Erithacus rubecula (L.) . Ornis fennica , 14 S.71–73.
   Google Scholar
• Parslow , J. L.F. 1962 . Immigration of night migrants into southern England in spring 1962 . Bird migration , 2 : 160 – 175 .
   Google Scholar
• Parslow , J. L.F. 1969 . The migration of passerine night migrants across the English Channel studied by radar . Ibis , 3 : 48 – 79 .
   Google Scholar
• Patapavičius , R. 1983 . 1988. Bird ringing in Lithuania. Annual reports, 1982–1987 (in Lithuanian).
   Google Scholar
• Pennycuick , C. J. 1969 . The mechanics of bird migration . Ibis , 111 : 48 – 79 .
   Web of Science ®Google Scholar
• Petraitis , A. 1975 . Spring migration of birds in the coastal area of the Baltic Sea . Proc. All-union Conf. on Bird Migration, Moscow, Part , 2 : 36 – 38 . (in Russian).
   Google Scholar
• Petraitis , A. 1976 . On the ecology of wintering waterfowl in Lithuania. Migration of Birds, Tallinn 129 – 133 . (in Russian).
   Google Scholar
• Petraitis , A. 1987 . “ Migration of birds in the region of Palanga ” . In Study, Modelling and Forecasting of Seasonal Bird Migration Edited by: Žalakevičius , M. 52 – 60 . Vilnius, Mokslas p. (in Russian).
   Google Scholar
• Petraitis , A. 1988 . Seasonal migration of the Wood Pigeon in the coastal zone of the Baltic Sea. Abstracts of XII Baltic Ornith. Conf., Vilnius 188 – 190 . (in Russian).
   Google Scholar
• Petraitis , A. 1991 . Steller's Eider at Lithuanian Baltic coast from 1969 till 1991. . Acta Ornith. Lit. , 4 : 96 – 107 .
   Google Scholar
• Petraitis , A. , Žalakevičius , M. Budrytė , V. 1976 . Peculiarities of autumnal bird migration in Lithuania. Proc. of IX Baltic Ornith. Conf. Vilnius 212 – 216 . (in Russian).
   Google Scholar
• Petraitis , A. , Budrytė , V. and Kurlavičius , P. 1976 . Peculiarities of spring bird migration in Lithuania. Proc. of IX Baltic Ornith. Conf., Vilnius 206 – 209 . (in Russian).
   Google Scholar
• Petraitis , A. and Žalakevičius , M. 1978 . Visual and radar observations of the autumnal bird migration in Lithuania. In: Transcontinental relations of migrating birds and their role in the spread of arbovirus, Novosibirsk 34 – 40 . (in Russian).
   Google Scholar
• Petraitis , A. and Gražulevičius , G. 1983 . Seasonal migrations of the Crane in the coastal area of the Baltic Sea. Abstr. of XI Baltic Ornithol. Conf. Tallinn 179 – 181 . (in Russian).
   Google Scholar
• Pfander , P. V. 1988 . Mechanism of the formation of raptors autumn migration waves in relation to the weather . Ornithology , 23 : 123 – 137 . (in Russian).
   Google Scholar
• Pihl , S. and Frikke , J. 1992 . Counting birds from aeroplane. Eds.: J.Komdeur, J.Bertelsen, G.Cracknell. Manual for Aeroplane and Ship Surveys of Waterfowl and Seabirds . IWRB Special Publication, No , 19 : 8 – 23 .
   Google Scholar
• Pukas , A. 1986 . Understanding of the microhabitat and perspectives of conservation of endangered birds. Problems and ways of rational use of natural resources and conservation of nature, Vilnius 1986 – 1988 . (in Russian).
   Google Scholar
• Rabøl , J. and Hindsbo , O. 1972 . A comparison of the bird migration recorded by radar and visible field observations in the middle of Gjaelland, spring 1971. Dan. Ornith. Foren . Tidsskr, vol , 66 : 86 – 96 .
   Google Scholar
• Rabøl , J. and Hansen , K. 1978 . Environmental variables and the nightly migration ratio of the Robin on the island Hjelm Edited by: Schmidt-Koening , K. and Keeton , W. 294 – 301 . Animal migration . navigation and homing, p.
   Google Scholar
• Rabøl , J. 1978 . A field method of estimating the migratory readiness of birds . Oikos , 30 : 398 – 400 .
   Web of Science ®Google Scholar
• Raudonikis , L . 1989 . Wintering waterfowl in Lithuania,1988., Report.
   Google Scholar
• Raudonikis , L. and Švažas , S. 1991 . A short note on geese migration in Lithuania . Ardea , 79 : 123 – 124 .
   Web of Science ®Google Scholar
• Richardson , W. J. 1966 . Weather and late spring migration of birds into southern Ontario . Wilson Bull. , 78 : 400 – 414 .
   Google Scholar
• Richardson , W. J. 1970 . Temporal variations in the volume of bird migration: a radar study in Canada. Proc. World Conf. on Bird Hazards to Aircraft. Kingston, Ontario 323 – 334 .
   Google Scholar
• Richardson , W. J. 1971 . Weather and late spring migration of birds into southern Ontario . Wilson Bull. , 78 : 400 – 414 .
   Google Scholar
• Richardson , W. J. 1972a . Autumn migration and weather in eastern Canada: a radar study. . Amer. Birds , 26 : 10 – 17 .
   Google Scholar
• Richardson , W. J. 1974a . Multivariate approaches to forecasting day-to-day variations in the amount of bird migration Edited by: Gauthreaux , J. 309 – 329 . Clemson Univ. S.C. . Proc. Conf. Biol. Aspects of the Bird. Aircraft Collision Prob. Ed. S.A. p.
   Google Scholar
• Richardson , W. J. 1974b . Spring migration over Puerto Rico and the western Atlantic: a radar study. . Ibis , 116 : 172 – 193 .
   Web of Science ®Google Scholar
• Richardson , W. J. 1975 . Bird migration over southeastern Canada, the western Atlantic, and Puerto Rico: a radar study. Ph. D. thesis, Cornell Univ. Ithaca. N.Y. Univ. Microfilms 76 – 21122 .
   Google Scholar
• Richardson , W. J. 1978a . Timing and amount of bird migration in relation to weather: a review. . Oikos , 30 : 224 – 272 .
   Web of Science ®Google Scholar
• Richardson , W. J. 1978b . Reorientation of nocturnal landbird migrants over the Atlantic Ocean near Nova Scotia in autumn. . Auk , 95 : 717 – 732 .
   Web of Science ®Google Scholar
• Richardson , W. J. 1985 . The influence of weather on orientation and numbers of avian migrants over eastern Canada: a review . Contrib. Mar. Sci. (Suppl.). , 27 : 604 – 617 .
   Google Scholar
• Richardson , W. 1990a . “ Timing of bird migration in relation to weather: updated review ” . In Bird migration Edited by: Gwinner , E. 78 – 101 .
   Google Scholar
• Richardson , W. 1990b . Wind and orientation of migrating birds: a review. . Experientia , 46 : 416 – 424 .
   Google Scholar
• Rootsmäe , J. 1961 . Randlindude kevadisest saabumisest Mustveesse . Omitoloogiline kogumik. Tartu , 2 : 242 – 244 .
   Google Scholar
• Rose , P. and Taylor , V. 1993 . Western Palearctic and SW Asia Waterfowl Census 1993. IWRB. Slimbridge, UK. 215
   Google Scholar
• Rose , P. M. and Scott , D. A. 1994 . Waterfowl population estimates. IWRB Report, No 29.102 pp.
   Google Scholar
• Rose , P. and Scott , D. (in press). Anatidae flyways atlas for the Western Palearctic, Middle East and Africa/IWRB spec. publ.
   Google Scholar
• Russanow , J. S. 1987 . Game waterfowl. Moscow 188
   Google Scholar
• Schifferli . 1990 . Waterfowl. (Special issue 1990 edited by the Swiss Ornithological Institute) 33
   Google Scholar
• Serebriakov , V. 1976 . Phenology of bird spring arrival to environs of Kiev . Zool. probl., Kiev, No , 6 : 75 – 78 . (in Russian).
   Google Scholar
• Serebriakov , V. 19S . 22 0. Phenological regularities of bird spring migration on the territory of Ukraine. Cand. of Biol. Sc. Thesis. Kiev, pp. (in Russian).
   Google Scholar
• Siivonen , L. 1941 . Einige Beobachtungen uber die nahrung der in Petsamo uber wintemden scheckente . Polysticta stellen , 18 und einiger anderen entevogel. Omis Fenilica, (1).
   Google Scholar
• Sinkevičius , S. 1984 . Urkis reserve. Mūsų Gamta, No 10. 12 – 13 . (in Lithuanian).
   Google Scholar
• Skuodis , V. and Kuprytė , A. 1989 . Bird ringing in Lithuania in 1960–1974. Vilnius. 216 (in Lithuanian).
   Google Scholar
• Stanevičius , V. 1983 . Bird spring arrival to Žuvintas Strict Nature Reserve. Proc. of XI Baltic Ornith. Conf., Tallinn 204 – 206 . (in Russian).
   Google Scholar
• Stanevičius , V. 1984 . Dynamics of the number and characteristics of distribution of the Coot during the post-breeding season on the lakes of the Meteliai Regional Park. Recent situation of the resources of waterfowl, Moscow 32 – 33 . (in Russian).
   Google Scholar
• Stanevičius , V. 1987 . “ Formation of the post-breeding concentrations of waterfowl on south Lithuanian lakes ” . In Study, modelling and forecasting of seasonal bird migration, Vilnius Edited by: Žalakevičius , M. 166 – 176 . (in Russian).
   Google Scholar
• Stanevičius , V. 1990 . Herbivorous waterfowl in Dusia lake: bird number, migration, wintering, food supply . Acta Ornith. Lit. , 3 : 105 – 112 .
   Google Scholar
• Stanevičius , V. 1992 . Abundance structure and spatial distribution of ornithological complexes of lakes in South Lithuania. Cand. of Biol. Sc.Thesis. Moscow. 18 (in Russian).
   Google Scholar
• Stanevičius , V. 1993 . Post-breeding avifauna of South Lithuanian lakes: species composition and numbers . Acta Ornith. Lit. , 7–8 : 78 – 85 .
   Google Scholar
• Stanevičius , V. 1994 . The process of the formation of post-breeding Avifauna on South Lithuania lakes . Acta Ornith. Lit. , 9–10 : 105 – 117 .
   Google Scholar
• Stanevičius , V. 1995 . Recent changes in lake's nonbreeding avifauna in Lithuania. Abstr. of International Conference and 13th Meeting of the European Bird Census Council, p.49.
   Google Scholar
• Stempniewicz , L. 1986 . The food intakes of Melanitta fusca . M. nigra , 11 : 211 – 214 . wintering in the Gulfof Gdansk. Var Vagelv. Suppl.
   Google Scholar
• Sterbetz , J. 1984 . The migrant mollusc ( . Dreisena polymorpha Pall. , 19 : 201 – 204 . as the aliment of notatorial birds at the Tissa- Valley. Tiscia.
   Google Scholar
• Stolt , B . 1969 . Temperature and air pressure experiments on activity in passerine birds with notes on seasonal and circadian rhythms . Zool. Uppsala , 38 : 175 – 231 . O. p.
   Google Scholar
• Sutter , E. 1957 . Radar-Beobachtungen uber den Verlauf des nachtlichen Vogelzuges . Rev. Suisse Zool. , 64 : 294 – 303 .
   Google Scholar
• Sutter , W. 1991 . Uberwinternde Wasservögel auf Schweizer Seen: Welche Gewässereigenshaften bestimmen Arten- und Indwiduenzahl? . Der Ornithologishe Beobachter , 88 : 81 – 100 .
   Google Scholar
• Swanson , G. A. and Meyer , M. L. 1973 . The role of invertebrates in the feeding ecology of Anatidae during the breeding season. Waterfowl Habitat Management Symposium. 30 July-1 August 1973. Moncton N.B. p. 145 – 185 .
   Google Scholar
• Švažas , S. 1990 . Flocking behaviour of nocturnal migrants . Acta Ornith. Lit. , 2 : 36 – 57 .
   Google Scholar
• Švažas , S. 1991 . Species composition and abundance of nocturnal autumnal bird migrants in the continental part of Lithuania . Acta Ornith. Lit. , 4 : 52 – 63 .
   Google Scholar
• Švažas , S. 1992 . The significance of Lithuanian marine waters for the wintering population of the Velvet Scoter . Acta Omit. Lit. , 5–6 : 39 – 41 .
   Google Scholar
• Švažas , S. 1993a . Weather factors affecting migratory take-off of nocturnal migrants in autumn. . Acta Ornith. Lit. , 7–8 : 27 – 35 .
   Google Scholar
• Švažas , S. 1993b . Distribution of migrating birds ill the air space at night. Proc. “Baltic Birds- 6” Conf., Pruchten 81 – 87 .
   Google Scholar
• Švažas , S. 1994 . Weather Factors Affecting Migratory Activity of Low-flying Nocturnal Migrants in Autumn . Acta Ornith. Lit. , 9–10 : 30 – 37 .
   Google Scholar
• Švažas , S. and Gražulevičius , G. 1987 . “ Study, modelling and forecasting of seasonal bird migration ” . In Visual observations of geese migration in Lithuania Edited by: Žalakevičius , M. 63 – 75 . Vilnius p. (in Russian).
   Google Scholar
• Švažas , S. , Raudonikis , L. , Vaitkus , G. and Pareigis , V. 1989 . 36 Wintering waterfowl in Lithuania, Vilnius
   Google Scholar
• Švažas , S. , Raudonikis , L. , Petraitis , A. and Valius , Ž. 1990 . Summer passage of birds in the Lithuanian Baltic coast (Palanga district) . Acta Ornith. Lit. , 2 : 57 – 63 .
   Google Scholar
• Švažas , S and Žalakevičius , M. 1991 . Intensive summer movements of the Great Spotted Woodpecker ( . Dendrocopos major , 4 : 63 – 67 . in the Lithuanian coastal areas. Acta Ornith. Lit.
   Google Scholar
• Švažas , S. and Vaitkus , G. 1992 . Numbers and distribution of wintering seaducks ill Lithuanian coastal areas in 1987–1992. IWRB Seaduck Bulletin, No 2. 10 – 19 .
   Google Scholar
• Švažas , S. , Vaitkus , G and Vinskas , D. 1992 . Numbers and distribution of wintering waterfowl in Lithuanian coastal areas in 1987–1992 . Acta Ornith. Lit. , 5–6 : 42 – 48 .
   Google Scholar
• Švažas , S. , Meissner , W. and Nehls , H. W. 1994 . Wintering populations of Goosander and Smew at the South Eastern Baltic coast . Acta Ornith. Lit. , 9–10 : 56 – 70 .
   Google Scholar
• Švažas , S. and Vaitkus , G. 1995 . Numbers and distribution of seabirds at Lithuanian coast Edited by: Lazauskienė , L. 106 – 116 . Vilnius The Būtingė Oil terminal. Ed.:, p.
   Google Scholar
• Tamisier , A. 1985 . Some considerations on the social requirements of ducks in winter . Wildfowl , 36 : 104 – 108 .
   Google Scholar
• Tamošaitis , J. , Klimkaitė , I. and Martinkėnienė , E. 1984 . Ecological problems of lake Žuvintas. Materials of Acad, of Sc. of Lithuanian SSR. 141 – 149 . (m Russian).
   Google Scholar
• Tasker , M L , Jones , P. H. , Dixon , T. J. and Blake , B. F. 1984 . Counting seabirds from ships: a review of methods employed and a suggestion of a standardised approach . Auk , 101 : 567 – 577 .
   Web of Science ®Google Scholar
• Trainauskaitė , I. , Vasiliauskienė , M. , Šarkinienė , J. and Mockutė , A. 1977 . Distribution, flora and biomass of macrophyts. Hydrobiological investigation in lakes of Dusia, Galstas, Slavantas, Obelija 43 – 70 . (in Russian).
   Google Scholar
• Tuck , L. 1972 . The Snipes . Can. Wildl. Monogr. Series. No , 5 p.52.
   Google Scholar
• Vaitkevičius , A. 1956 . General characteristics of bird migration in the Ventės Ragas (Lithuanian SSR) in autumn 1954. Chronicle of the Society of Naturalists at the Ac. Sci . of Estonian SSR , 49 : 17 – 30 . (in Russian).
   Google Scholar
• Vaitkevičius , A. 1958 . The influence of geographical conditions on bird migration. Abstr. of III Baltic Ornith. Coni, Vilnius 18 – 18 . (in Russian).
   Google Scholar
• Vaitkevičius , A. 1959 . Migration of order passerines in the Ventės Ragas in 1954–1956. Proc. of III East Baltic Ornith. Conf., Vilnius 41 – 50 . (in Russian).
   Google Scholar
• Vaitkevičius , A. 1960a . Numbers of birds crossing the coastal area of the Kuršių Lagoon. Proc. of problematic and thematic meetings of ZIN, Leningrad 151 – 160 . (ui Russian).
   Google Scholar
• Vaitkevičius , A. 1960b . Autumnal migration along the Kuršių Spit. Abstr. of II Ornith. Conf., Moscow (in Russian).
   Google Scholar
• Vaitkevičius , A. 1961a . Bird migration asan important biological and zoological problem. Geography Chronicle, p.4 (in Russian).
   Google Scholar
• Vaitkevičius , A. 1961b . Bird migration along the Kuršių Spit in autumn 1958. Ornithological collection, Tartu, (in Russian).
   Google Scholar
• Vaitkevičius , A. and Skuodis , V. 1965 . 115 Bird migration, Vilnius
   Google Scholar
• Vaitkevičius , A. 1966 . The influence of paleogeographical conditions on the formation of bird migration on tire White-Baltic Sea route. Proc. of VI Baltic Ornith. C'onf. Vilnius, (in Russian).
   Google Scholar
• Vaitkevičius , A. 1967 . Results of visual observations of waterfowl in Kuršių Lagoon in 1962. Proc. of the tifth Baltic omith. conf., Tallinn 210 – 215 . (in Russimi).
   Google Scholar
• Vaitkevičius , A. 1968 . Visible migration of waterfowl and other water birds in Lithuania. Reports of East Baltic Commission on the study of bird migration. Tartu, No 5. 44 – 67 . (in Russian).
   Google Scholar
• Vaitkus , G. 1994a . Vulnerable seabird concentrations in the offshore oil drilling area along the Kuršių . Spit. Acta Ornith. Lit , 9–10 : 73 – 77 .
   Google Scholar
• Vaitkus , G. 1994b . Severe winter seaduck concentrations in the Baltic Proper. Proc. of the “Anatidae 2000” Int. conf.
   Google Scholar
• Vaitkus , G. 1994c . Seabird densities in central and eastern Baltic during late winter 1963. IWRB Seaduck Research Group Bulletin. No 4. 42 – 47 .
   Google Scholar
• Vaitkus , G. , Dagys , M , Žydelis , R. and Kolesinskas , T. 1993 . Preliminary report on winter-period beached bird densities in the Lithuanian coastal areas . Acta Omit. Lith. , 7–8 : 68 – 73 .
   Google Scholar
• Vaitkus , G. , Petraitis , A. and Žydelis , R. 1994 . Beached bird density trends in Lithuania during 1991–1994 . Acta Ornith. Lit. , 9–10 : 78 – 86 .
   Google Scholar
• Valius , M. 1966 . Waterfowl of some lakes of Baltic hilly region. Abstr. of VI Baltic Ornith. Conf., Vilnius 21 – 23 . (in Russian).
   Google Scholar
• Valius , M. 1980 . Periodical and other ecological features of Lithuanian waterfowl. Birds of Lithuanian waters. Vilnius 43 – 107 . (in Lithuanian).
   Google Scholar
• Valius , M. 1990 . Diary of the naturalist. Vilnius. 852 (in Lithuanian).
   Google Scholar
• Vasiliauskienė , M. 1975 . Littoral characteristics. Sedimentation in little lakes of South Lithuania, Vilnius 127 – 145 . (in Russian).
   Google Scholar
• Vasiliauskienė , M. , Grigelytė , M. and Tamošaitis , J. 1977 . Physico-geographical characteristics of lakes Dusia, Obelija, Galstas, Šlavantas and their basins. Limnological characteristics of Lakes Dusia, Obelija, Galstas and Šlavantas. Vilnius 7 – 41 . (in Russian).
   Google Scholar
• Verheijen , F. J. 1980 . The Moon: a neglected factor in studies on collisions of nocturnal migrating birds with tall lighted structures and with aircraft . Vogelwarte , 30 : 305 – 320 .
   Google Scholar
• Viksne , J. A. , Nedzinskas , V. S. and Reno , O. J. 1981 . Abundance. Distribution and development of Black-headed Gull population in a Baltic countries. Distribution and number of the Black-headed Gull. Moscow 5 – 14 .
   Google Scholar
• Vitkauskas , V. and Žalakevičius , M. 1984 . The study of some characteristics of nocturnal migration of birds in Lithuania. Aviation-ornithological Investigation in Lithuania, Vilnius 80 – 90 . (in Russian).
   Google Scholar
• Vleugel , D. A. On the night-migration of thrushes and their probable orientation. . Limosa , 27 1 – 19 .
   Google Scholar
• Wagner , H. O. 1930 . Uber Jahress- und Tagesrhythums bei zugvogeln . (1. Mitteibing). Z. vergl. Physiol. , 12 : 703 – 724 . S.
   Google Scholar
• Wallraff , H. G. 1978 . Social interrelations involved in migratory orientation of birds: possible contributions of field studies . Oikos , 30 : 401 – 405 .
   Web of Science ®Google Scholar
• Webb , A. and Durink , J. 1992 . “ Counting birds from ship ” . In IWRB Special Publication , Manual for aeroplane and ship surveys of waterfowl and seabirds Edited by: Komdeur , J. , Bertelzon , J. and Cracknell , G. Vol. 19 , 24 – 37 . No
   Google Scholar
• Wege , M. and Raveling , D. 1983 . Factors influencing the timing, distance and path of migrations of Canada Goose . Wilson Bull. , 95 : 209 – 221 .
   Google Scholar
• Wieloch , M. 1990 . The wintering of the Mute Swan. Proc. of “Baltic Birds- 5” Conf., Riga 237 – 242 .
   Google Scholar
• Williams , T. C. , Williams , J. M. , Ireland , L. C. and Teal , J. M. 1977 . Autumnal bird migration over the western North Atlantic Ocean . Amer. Birds , 31 : 251 – 267 .
   Google Scholar
• Zomerdijk , P. I. 1979 . The moulting of Tufted Duck and Pochard on Ijsselmeer in relation to moult concentrations in Europe . Wildfowl , 30 : 99 – 108 .
   Google Scholar
• Žalakevičius , M. 1975 . The experience in the study of bird migration in the Lithuanian SSR with the help of airport radars. Matherials of the Soviet Union conference for bird migration, part II., Moscow 107 – 108 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1976 . Routes of moult migration of Common Scoter in Lithuania according to radar investigations. Proc. of IX Baltic Ornith. Conf., Vilnius 92 – 94 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1977 . The study of bird migration with the help of radars. Methods of Studying Bird Migrations. Moscow; 117 – 123 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1978 . On moult migration of Common Scoter basing on radar observation in Lithuania . Materials of Baltic commission on bird migration study, Tartu , 11 : 24 – 36 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1981a . Nocturnal dynamics of autumnal migration in SE Baltic Region. . Abstr. of X E Baltic Ornith. Conf. Riga , 1 : 118 – 121 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1981b . Radar investigation of autumnal migration of birds over the zone of the Kuršhų Spit in 1977. Methods of Detecting and Registering Bird Migration, Leningrad 45 – 50 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1981c . Some aspects of the dependence of the intensity of seasonal bird migrations upon weather conditions. . Proc. of 10 Baltic Ornith. Conf., Riga , 1 : 115 – 117 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1981d . The dependence of the intensity of spring migration of birds upon weather according to radar investigations in Lithuania. Ecology and Protection of Birds. Proc. of VIII Ornith. Conf., Kishinev, p.81.
   Google Scholar
• Žalakevičius , M. 1982 . Radar investigations of bird migration in the Lithuanian SSR. Cand. of Biol. Sc. Thesis, Moscow (in Russian).
   Google Scholar
• Žalakevičius , M. 1983a . Peculiarities of seasonal bird migration in Lithuania in relation to landscape and weather conditions. Proc. of IX Baltic Ornith. Conf., Tallinn 44 – 46 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1983b . Migration of birds and cloud type. Proc. Of XI Baltic Ornith. Conf., Tallinn 88 – 90 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1984 . The study of seasonal bird migration in Lithuania trying to make a short-term prognosis. The dependence of the intensity of autumnal migration upon weather on the basis of radar investigations. Aviation-ornithological investigations in Lithuania 30 – 57 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1985 . Radar study of the relationship between bird migration and weather in Lithuania . Zoological Journal , 64 : 72 – 27 . No 1. (in Russian).
   Google Scholar
• Žalakevičius , M. 1986a . Bird migration. Vilnius. Mokslas 134 (in Lithuanian).
   Google Scholar
• Žalakevičius , M. 1986b . Radar investigations and modelling of the reverse migration in Lithuania. . Zool. Journal , 65 : 1433 – 1434 . No 9., (in Russian).
   Google Scholar
• Žalakevičius , M. 1987 . Seaduck moult migration in Lithuanian coastal areas. Study, modelling and forecasting of seasonal bird migration Edited by: Žalakevičius , M. 60 – 63 . Vilnius, p. (in Russian).
   Google Scholar
• Žalakevičius , M. 1987a . The theory of controlling seasonal bird migration. Investigations of nocturnal autumnal migration by the electric light of hothouses. Vilnius 116 – 146 . (in Russian).
   Google Scholar
• Žalakevičius , M. 1987b . Relation of bird migration to weather. Modelling and forecasting. Study, modelling and forecasting of seasonal bird migration Edited by: Žalakevičius , M. 116 – 149 . Vilnius, p. (in Russian).
   Google Scholar
• Žalakevičius , M. 1990a . The study of mechanisms controlling migratory take-off in spring and autumn. . Acta Ornith. Lit. , 3 : 3 – 52 .
   Google Scholar
• Žalakevičius , M. 1990b . Ecological aspects of seasonal bird migration control. Dr. Habil. Thesis, Moscow 46 (in Russian).
   Google Scholar
• Žalakevičius , M. 1991 . Visible bird migration as a part of the whole migratory passage . Acta Ornith. Lit. , 4 : 27 – 38 .
   Google Scholar
• Žalakevičius , M. 1993 . Mechanisms controlling migratory take-off in spring and autumn . Acta Ornith. Lit. , 7–8 : 16 – 26 .
   Google Scholar
• Žalakevičius , M. 1995 . Birds of Lithuania . Acta Ornith. Lit. , 11 : 7 – 27 . (special issue), p.
   Google Scholar
• Žalakevičius , M. and Petraitis , A. 1992 . The theory of controlling bird migration: corroboration of radar studies by the diurnal autumnal visual observations of separate species. Acta Ornith . Lit. , 5–6 : 3 – 10 .
   Google Scholar
• Žalakevičius , M. and Petraitis , A. 1993 . Species composition and numbers of diumal bird migration in Lithuania and its periodicity within the season . Acta Ornith. Lit. , 7–8 : 36 – 44 .
   Google Scholar