Data Zone
BirdLife International. 2004. Birds in Europe: population estimates, trends and conservation status. BirdLife International, Cambridge, U.K.
Brazil, M. 2009. Birds of East Asia: eastern China, Taiwan, Korea, Japan, eastern Russia. Christopher Helm, London.
eBird. 2021. eBird: An online database of bird distribution and abundance [web application]. Available at: https://ebird.org/home.
Erritzøe, J., Mann, C.F., Brammer, F.P., and Fuller, R.A. 2012. Cuckoos of the world. Bloomsbury (Christopher Helm).
Global Forest Watch. 2021. Available at: https://www.globalforestwatch.org. (Accessed: 18 June 2021).
Hagemeijer, E.J.M. and Blair, M.J. 1997. The EBCC atlas of European breeding birds: their distribution and abundance. T. and A.D. Poyser, London.
IUCN. 2021. The IUCN Red List of Threatened Species. Version 2021-3. Available at: https://www.iucnredlist.org. (Accessed: 09 December 2021).
Payne, R.B. 1997. Cuculidae (Cuckoos). In: J. del Hoyo, A. Elliott & J. Sargatal (eds), Handbook of the birds of the world, pp. 508-607. Lynx Edicions, Barcelona, Spain.
Recommended citation
BirdLife International (2024) Species factsheet: Oriental Cuckoo Cuculus optatus. Downloaded from
https://datazone.birdlife.org/species/factsheet/oriental-cuckoo-cuculus-optatus on 22/12/2024.
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 22/12/2024.