Using generalised additive models to visualise the annual cycle of primary feather moult patterns

References

• Barshep Y, Minton COT, Underhill LG, Emi B, Tomkovich P. 2013. Flexibility and constraints in the molt schedule of long-distance migratory shorebirds: cau ses and consequences. Ecology and Evolution 3: 1967–1976.https://doi.org/10.1002/ece3.612
   PubMed Web of Science ®Google Scholar
• Boersch-Supan PH, Hanmer HJ, Robinson RA. 2022. Bayesian infer ence for models of moult duration and timing in birds. ar Xiv. 2205.12120. https://doi.org/10.48550/arXiv.2205.12120
   Google Scholar
• Boersch-Supan PH, Lee ATK, Oschadleus HD. 2023. A demonstration of the value of recapture data for informing moult phenology models for avian species with imperfect moult data. Ostrich 94: 315–323. https://doi.org/10.2989/00306525.2023.2248396
   Google Scholar
• Bonnevie BT, Oschadleus HD. 2010. Timing of primary wing moult in sexually dimorphic passerines from the Western Cape, South Africa. Ostrich 81: 63–67. https://doi.org/10.2989/00306525.2010.455821
   Web of Science ®Google Scholar
• Bonnevie BT, Craig AJFK, Hulley PE, Schultz A, Tree AJ. 2023. Wing-moult and seasonal occurrence of sunbirds (Nectariniidae) captured at four sites in the Eastern Cape, South Africa. Ostrich 94: 304–314. https://doi.org/10.2989/00306525.2022.2075482
   Google Scholar
• Broekhuysen GJ. 1959. The biology of the Cape Sugarbird Promerops cater (L.). Ostrich 30(S1): 180–221. https://doi.org/10.1080/00306525.1959.9633326
   Google Scholar
• Broekhuysen GJ. 1963. The breeding biology of the Oran gebreasted Sunbird Anthobaphes violacea (Linnaeus). Ostrich 34: 187–234. https://doi.org/10.1080/00306525.1963.9633478
   Google Scholar
• Christensen BA. 2000. Biomechanics and behavior of hummingbird molt. MSc thesis, University of British Columbia, Canada.
   Google Scholar
• Craig AJFK, Hulley PE. 1994. Sunbird movements: a review, with possible models. Ostrich 65: 106–110. https://doi.org/10.1080/00306525.1994.9639672
   Web of Science ®Google Scholar
• Craig AJFK, Bonnevie BT, Hulley PE, Underhill GD. 2014. Primary wing-moult and site fidelity in South African mousebirds (Coliidae). Ostrich 85: 171–175. https://doi.org/10.2989/00306525.2014.931310
   Web of Science ®Google Scholar
• de Beer SJ, Lockwood GM, Raijmakers JHFA, Raijmakers JMH, Scott WA, Oschadleus HD, Underhill LG. 2001. SAFRING bird ringing manual. ADU Guide 5. Cape Town: Avian Demography Unit, University of Cape Town.
   Google Scholar
• De Ia Hera I, Perez-Tris J, Telleria JL. 2009. Migratory behaviour affects the trade-off between feather growth rate and feather quality in a passerine bird. Biological Journal of the Linnean Society 97: 98–105. 10.1111/j.1095-8312.2008.01189.x
   Web of Science ®Google Scholar
• de Sward DH. 1992. Distribution, biometrics and moult of Gurney's Sugarbird Promerops gurneyi. Ostrich 63: 13–20. https://doi.org/10.1080/00306525.1992.9634176
   Web of Science ®Google Scholar
• de Sward DH. 1998. Aspects of the behaviour and ecology of Gurn ey's Sugarbird Promerops gurneyi Verreaux, 1871, in Protea woodland, South Africa. MSc thesis, University of the Free State, South Africa.
   Google Scholar
• de Sward DH. 2002. Moult and eclipse plumage of Malachite Sunbirds, Nectarinia famosa , in the Free State, South Africa. Ostrich 73: 176–179.
   Web of Science ®Google Scholar
• Earle RA. 1982. Aspects of the breeding biology and ecology of the Whitebellied Sunbird. Ostrich 53: 65–73. https://doi.org/10.1080/00306525.1982.9634728
   Web of Science ®Google Scholar
• Echeverry-Galvis MA, Hau M. 2013. Flight performance and feather quality: paying the price of overlapping moult and breeding in a tropi cal highland bird. PLoS ONE 8: e61106. https://doi.org/10.1371/journal.pone.0061106
   PubMed Web of Science ®Google Scholar
• Erni B, Bonnevie BT, Oschadleu s HD, Altwegg R, Underhill LG. 2013. moult: An R package to analyze moult in birds. Journal of Statistical Software 52: 1–23. https://doi.org/10.18637/jss.v052.i08
   PubMed Web of Science ®Google Scholar
• Flinks H, Salewski V. 2012. Quantifyin g the effect of feather abrasion on wing and tail lengths measurements. Journal of Ornithology 153: 1053–1065. https://doi.org/10.1007/s10336-012-0834-2
   Web of Science ®Google Scholar
• Freed LA, Cann RL. 2012. Changes in timing, duration, and symmetry of molt of Hawaiian forest birds. PLoS ONE 7: e29834. https://doi.org/10.1371/journal.pone.0029834
   PubMed Web of Science ®Google Scholar
• Ginn HB, Melville OS. 1983. Moult in birds. BTO Guide 19. Tring: British Trust for Ornithology.
   Google Scholar
• Haworth ES, Cunningham MJ, Calf Tjørve KM. 2018. Population diversity and relatedness in Sugarbirds (Promeropidae: Promerops spp.). PeerJ 6: e5000. https://doi.org/10.7717/peerj.5000
   PubMed Web of Science ®Google Scholar
• Hemborg C. 1999. Sexual differ ences in moult-breeding overlap and female reproductive costs in pied flycatchers, Ficedula hypoleuca. Journal of Animal Ecology 68: 429–436. https://doi.org/10.1046/j.1365-2656.1999.00295.x
   Web of Science ®Google Scholar
• Hockey PAR, Dean WRJ, Ryan PG. 2005. Roberts birds of southern Africa (7th edn). Cape Town: Trustees of the John Voelker Bird Book Fund.
   Google Scholar
• Hulley PE, Craig AJFK, Underhill GD, Bonnevie BT, Nuttall RJ, de Swardt DH. 2004. Timing of moult and breeding in the Cape White-eye, Zosterops pallidus, from three different geographical regions in South Africa. Emu -Austral Ornithology 104: 353–358. https://doi.org/10.1071/MU03055
   Google Scholar
• Humphrey PS, Parkes KC. 1959. An approach to the study of molts and plumages. The Auk 76: 1–31. https://doi.org/10.2307/4081839
   Google Scholar
• Irons R. 2022. Generalized additive models to analyse primary wing moult patterns. BSc Honours thesis, University of Cape Town, South Africa.
   Google Scholar
• Lee ATK. 2023. Multiple circannual moult st rategies: bird feather tract moult patterns for common birds of the central Fynbos region, South Africa. Ostrich 94: 337–345. https://doi.org/10.2989/00306525.2023.2277511
   Google Scholar
• Lee ATK, Barnard P, Hockey PAR. 2015. Population metrics for fynbos birds, South Africa: densities, and detection and capture rates from a Mediterranean-type ecosystem. Ostrich 86: 179–187. https://doi.org/10.2989/00306525.2015.1021287
   Web of Science ®Google Scholar
• Lee ATK, Barnard P, Fraser M, Lennard C, Smit B, Oschadleus, HD. 2020. Body mass and condition of a fynbos bird community: investigating impacts of time, weather and raptor abundance from long-term citizen-science data sets. Ostrich 91: 142–157. https://doi.org/10.2989/00306525.2019.1683093
   Web of Science ®Google Scholar
• Lind J, Jakobsson S, Kullberg C. 2010. Impaired predator evasion in the life history of bir ds: behavi oural and physiological adaptations to reduced flight ability. In: Thompson CF (ed), Current Ornithology, Volume 17. New York: Springer. pp:1-30.
   Google Scholar
• Møller AP, Thornhill R. 1998. Male par ental care, differential par ental investment by females and sexual selection. Animal Behaviour 55: 1507–1515. https://doi.org/10.1006/anbe.1998.0731
   PubMed Web of Science ®Google Scholar
• Newton I. 2009. Moult and plumage. Ringing and Migr ation 24: 220–226. https://doi.org/10.1080/03078698.2009.9674395
   Google Scholar
• Nwaogu CJ, Tieleman Bl, Cresswell W. 2019. Weak breeding season alily of a songbird in a seasonally arid tropical environment arises from individual flexibility and strong seasonal moult. Ibis 161: 533–545. https://doi.org/10.1111/ibi.12661
   Web of Science ®Google Scholar
• Oschadleus HD. 2005. Patterns of primary moult in the weavers, Ploceidae. PhD thesis, University of Cape Town, South Africa.
   Google Scholar
• Pedersen EJ, Miller DL, Simpson GL, Ross N. 2019. Hierarchical generalized additive models in ecology: an introduction with mgcv. PeerJ 7: e6876.https://doi.org/10.7717/peerj.6876
   PubMed Web of Science ®Google Scholar
• R Core Team. 2022. R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. Available at: https://www.R-project.org/
   Google Scholar
• Remisiewicz M, Tr ee AJ, Un derhill LG, Taylor PB. 2010. Rapid or slow moult? The choice of a primary moult strategy by immature Wood Sandpipers Tringa glareola in southern Africa. Journal of Ornithology 151: 429–441. https://doi.org/10.1007/s10336-009-0473-4
   Web of Science ®Google Scholar
• Rohwer S, Ricklefs RE, Rohwer VG, Copple MM. 2009. Allometry of the duration of flight feather molt in birds. PLoS Biology 7: e1000132. https://doi.org/10.1371/journal.pbio.1000132
   PubMed Web of Science ®Google Scholar
• Rose S, Thomson R L, Oschadleus H D, Lee ATK. 2020. Summarising biometrics from the SAFRING database for southern African birds. Ostrich 91: 169–173. https://doi.org/10.2989/00306525.2019.1645054
   Web of Science ®Google Scholar
• Schmid B, Nottebrock H, Esler KJ, Pagel J, Pauw A, Bohning Gaese K, Schurr FM, Schleuning M. 2016. Responses of nectar-feeding birds to floral resources at multiple spatial scales. Ecography 39: 619–629. https://doi.org/10.1111/ecog.01621
   Web of Science ®Google Scholar
• Squires TM, Yuda P, Akbar PG, Collar NJ, Devenish C, Taufiqurrahman I et al. 2021. Citizen science rapidly delivers extensive distribution data for birds in a key tropical biodiversity area. Global Ecology and Conservation 28: e01680. https://doi.org/10.1016/j.gecco.2021.e01680
   Web of Science ®Google Scholar
• Svensson E, Nilsen JA. 1997. The trade-off between molt and parental care: a sexual conflict in the blue tit? Behavioral Ecology 8: 92–98. https://doi.org/10.1093/beheco/8.1.92
   Web of Science ®Google Scholar
• Symes CT, Woodborne SM. 2011. Variation in carbon and nitrogen stable isotope ratios in flight feathers of a moulting White-bellied Sunbird Cinnyris tala tala. Ostrich 82: 163–166. https://doi.org/10.2989/00306525.2011.618248
   Web of Science ®Google Scholar
• Tjørve KMC. 2007. What can nest record cards tell us about timing of nesting and nesting success of Cape Sugarbirds Promerops cater? Ostrich 78: 649–652. https://doi.org/10.2989/ostrich.2007.78.3.14.325
   Web of Science ®Google Scholar
• Tomotani BM, Muijres FT, Koelman J, Casagrande S, Visser ME. 2018. Simulated moult reduces flight performance but overlap with breeding does not affect breeding success in long-distance migrant. Functional Ecology 32: 389–401. 10.1111/1365-2435.12974
   Web of Science ®Google Scholar
• Underhill LG. 1985. Estimating the parameters for primary moult-a new statistical model. Wader Study Group Bulletin 44: 27–29.
   Google Scholar
• Underhill LG. 1999. Avian demography: statistics and ornithology. Ostrich 70: 61–70. https://doi.org/10.1080/00306525.1999.9639750
   Web of Science ®Google Scholar
• Underhill LG, Joubert A. 1995. Relative masses of primary feathers. Ringing and Migration 16: 109–116. https://doi.org/10.1080/03078698.1995.9674099
   Google Scholar
• Underhill LG, Zucchini W. 1988. A model for avian primary moult. Ibis 130: 358–372. https://doi.org/10.1111/j.1474-919X.1988.tb08810.x
   Web of Science ®Google Scholar
• Wickham H, Averick M, Bryan J, Chang W, McGowan LD, Frangois R, et al. 2019. Welcome to the tidyverse. Journal of Open-Source Software 4: 1686. https://doi.org/10.21105/joss.01686
   Google Scholar
• Wolf LL, Wolf JS. 1976. Mating system and reproductive biology of malachite sunbirds. The Condor 78: 27–39. https://doi.org/10.2307/1366913
   Web of Science ®Google Scholar
• Wood SN. 2017. Generalized additive models: an Introduction with R (2nd edn). Boca Raton, Florida: Chapman and Haii/CRC. https://doi.org/10.1201/9781315370279
   Google Scholar