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Gyrfalcon Range Map - All About Birds
Gyrfalcon - Wikipedia
Gyrfalcon Overview, All About Birds, Cornell Lab of Ornithology
Gyrfalcon | Audubon Field Guide
Gyrfalcon Facts: Habitat, Diet, & Conservation Secrets
Gyrfalcon Identification - All About Birds
Gyrfalcon - eBird
Gyrfalcon - Facts, Diet, Habitat & Pictures on Animalia.bio
Gyrfalcon - BirdWeb
Gyrfalcon (Falco rusticolus) - GYRF - Birds of North America