• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Recommended citation
BirdLife International (2024) Species factsheet: Northern Hawk-owl Surnia ulula. Downloaded from https://datazone.birdlife.org/species/factsheet/northern-hawk-owl-surnia-ulula on 26/12/2024.
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 26/12/2024.