REFERENCES
- Bruderer , B. and Bruderer , H. 1993 . Distribution and habitat preferences of the Red-backed Shrike, Lanius collurio in Southern Africa. . Ostrich , 64 : 141 – 147 .
- Cody , M. L. 1974 . Competition and the structure of bird communities Princeton University Press .
- Greenberg , R. 1986 . “ Competition in migrant birds in the non-breeding season. ” . In Current Ornithology Vol. 111 Edited by: Johnston , R. 281 – 307 . New York Plenum Press
- Herrera , C. M. 1978 . Ecological correlates of residence and non-residence in a Mediterranean passerine bird community. . J. Anim. Ecol. , 47 : 871 – 890 .
- Lack , P. 1985 . The ecology of the land birds in Tsavo East National Park, Kenya. . Scopus , 9 : 9 – 24 . 57–96
- Lack , P. 1986 . Ecological correlates of migrants and residents in a tropical African savanna. . Ardea , 74 : 111 – 119 .
- Leisler , B. 1990 . “ Selection and habitat use of wintering migrants. ” . In Bird migration. Edited by: Gwinner , E. 156 – 174 . Berlin, Heidelberg : Springer Verlag .
- Leisler , B. 1992 . Habitat selection and co-existence of migrants and Afrotropical residents. . Ibis , 134 : 77 – 82 . (Suppl. 1)
- Leisler , B. 1993 . Habitat use and coexistence of palaearctic migrants and Afrotropical residents 565 – 570 . Proc. VIII Pan-Afr. Orn. Congr
- Leisler , B. , Heine , G. and Siebenrock , K. H. 1983 . Einnischung und interspezifische Territorialität überwinternder Steinschmätzer (Oenanthe isabellina, O. oenanthe, O. pleschanka) in Kenia. . J. Orn. , 124 : 393 – 413 .
- Lövei , G. L. 1989 . Passerine migration between the Palaearctic and Africa. . Current Ornithol. , 6 : 143 – 174 .
- Moreau , R. E. 1972 . The palaearctic-African bird migration system London, New York : Academic Press .
- Morel , G. J. and Morel , M-Y. 1992 . Habitat use by palaearctic migrant passerine birds in West Africa. . Ibis , 134 : 83 – 88 . (Suppl. I)
- Rabøl , J. 1987 . Co-existence and competition between overwintering Willow Warblers Phylloscopus trochilus and local warblers at Lake Naivasha, Kenya. . Ornis Scan. , 18 : 104 – 121 .
- Rabøl , J. 1990 . “ Competition between over-wintering Willow Warblers ” . In Phylloscopus trochilus and local warblers in the acacia-savannah in Kenya. Proc. 7th Nordic Orn. Congr. Skive, Denmark
- Sherry , T. W. and Holmes , R. T. 1996 . Winter habitat quality, population limitation, and conservation of Neotropical-Nearctic migrant birds. . Ecology , 77 ( 1 ) : 36 – 48 .
- v. Stünzner-Karbe , D. 1996 . “ Territorialität, Habitatnutzung und Furagierverhalten überwinternder Trauerschnäpper ” . In (Ficedulu hypoleuca) in West-Afrika. Diplomarbeit, Universität Bayreuth
- Thiollay , J. M. 1985 . The birds of Ivory Coast: Status and distribution. . Malimbus , 7 : 1 – 59 .