Bird, J.P., Martin, R., Akçakaya, H.R., Gilroy, J., Burfield, I.J., Garnett, S.G., Symes, A., Taylor, J., Şekercioğlu, Ç.H. and Butchart, S.H.M. 2020. Generation lengths of the world’s birds and their implications for extinction risk. Conservation Biology 34(5): 1252-1261. DOI: 10.1111/cobi.13486.
IUCN. 2021. The IUCN Red List of Threatened Species. Version 2021-3. Available at: https://www.iucnredlist.org. (Accessed: 09 December 2021).
Meehan, T. D.; LeBaron, G. S.; Dale, K.; Michel, N. L.; Verutes, G. M.; Langham, G. M. 2018. Abundance trends of birds wintering in the USA and Canada, from Audubon Christmas Bird Counts, 1966-2017, version 2.1. New York, New York, USA
Pardieck, K. L.; Ziolkowski Jr., D. J.; Lutmerding, M.; Hudson, M. A. R. 2018. North American Breeding Bird Survey Dataset 1966 - 2017, version 2017.0. U.S. Geological Survey, Patuxent Wildlife Research Center Available at: https://doi.org/10.5066/F76972V8.
Partners in Flight. 2020. Avian Conservation Assessment Database, version 2020. Available at: http://pif.birdconservancy.org/ACAD.
IUCN SSC Duck Specialist Group
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Recommended citation
BirdLife International (2024) Species factsheet: Ring-necked Duck Aythya collaris. Downloaded from
https://datazone.birdlife.org/species/factsheet/ring-necked-duck-aythya-collaris on 24/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 24/12/2024.