Northern Hawk-owl Surnia ulula


Bird, J.P., Martin, R., Akçakaya, H.R., Gilroy, J., Burfield, I.J., Garnett, S.G., Symes, A., Taylor, J., ?ekercio?lu, 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.

BirdLife International. In prep.. European Red List of Birds. Deliverable to the European Commission (DG Environment) in 2021 under Service Contract ENV.D.3/SER/2018/0018.

Cornulier, T., Yoccoz, N.G., Bretagnolle, V., Brommer, J.E., Butet, A., Ecke, F., Elston, D.A., Framstad, E., Henttonen, H., Hörnfeldt, B., Huitu, O., Imholt, C., Ims, R.A., Jacob, J., J?drzejewska, B., Millon, A., Petty, S.J., Pietiäinen, H., Tkaadlec, E., Zub, K. and Lambin, X. 2013. Europe-wide dampening of population cycles in keystone herbivores. Science 340(6128): 63-66.

Duncan, J. R. & Duncan, P. A. 2020. Northern Hawk Owl (Surnia ulula), version 1.0. In: S. M. Billerman (ed.), Birds of the World, Cornell Lab of Ornithology, Ithaca, NY.

Duncan, P. A. & Harris, W. C. 1997. Northern Hawk Owls (Surnia ulula caparoch) and forest management in North America: A review. Journal of Raptor Research 31: 187-190.

IUCN. 2021. The IUCN Red List of Threatened Species. Version 2021-3. Available at: (Accessed: 09 December 2021).

Komar, N. 2003. West Nile virus: epidemiology and ecology in North America. Advances in Virus Research 61: 185-234.

Partners in Flight. 2020. Population Estimates Database, version 3.1. Available at:

Partners in Flight. 2021. Avian Conservation Assessment Database, version 2021. Available at: (Accessed: 29/03/2021).

Virkkala, R., Heikkinen, R.K., Leikola, N. and Luoto, M. 2008. Projected large-scale range reductions of northern-boreal land bird species due to climate change. Biological Conservation 141: 1343-1353.

Further resources

Detailed species account from Birds in Europe: population estimates, trends and conservation status (BirdLife International 2004)

Detailed species account from European Red List of Birds (BirdLife International 2015)

Search for photos and videos, and hear sounds of this species from the Macaulay Library

Media resources

Recommended citation
BirdLife International (2022) Species factsheet: Surnia ulula. Downloaded from on 30/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from on 30/06/2022.