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Gyrfalcon or Gerfalcon
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Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Falconiformes
Family: Falconidae
Subfamily: Falconinae
Tribe: Falconini
Genus: Falco
Species: F. rusticolus
Binomial name
Falco rusticolus
Linnaeus, 1758
Synonyms

Gyrfalcon, Falco rusticolus is a species of falcon in the Falconidae family. It is a very large, heavy-bodied, broad-necked falcon.[1] It displays sexual dimorphism, the females being larger than the males[1][2][3] and they are the largest falcons.[2][3][4] It comes in three colour morphs: white[nb 1], grey and dark.[1][2][3][4][5]

Other names

Description

The Gyrfalcon's tail is very broad and moderately long; wings fairly long and broad-based for a falcon; outer wing tapers to a blunt tip.[1] It tail length equals that of its wing width.[1]

Similar species

Behaviour

Diet

Calls

Reproduction

Distribution/habitat

References

  1. ^ a b c d e Stokes, Donald W. and Stokes, Lilian Q. (2010). Stokes Field Guide to the Birds of North America. Little, Brown and Company. ISBN 9770316010504 Check |isbn= value: invalid prefix (help). 
  2. ^ a b c Liguori, Jerry; Pete Dunne (2011). Hawks at a Distance: Identification of Migrant Raptors. Princeton, NJ: Princeton University Press. p. 3. ISBN 0691135592.  Cite uses deprecated parameter |coauthors= (help);
  3. ^ a b c Clark, William S.; Brian K. Wheeler (2011). Hawks of North America, 2nd Edition. Boston, MA: Houghton Mifflin Company. p. 12. ISBN 0395670675.  Cite uses deprecated parameter |coauthors= (help);
  4. ^ a b Frances, Peter; et al. (2007). Bird: The Definitive Visual Guide. Dorling Kindersley Inc. ISBN 1564582957. 
  5. ^ Peterson, Roger Tory (1980). A Field Guide to the Birds East of the Rockies. Houghton Mifflin Company. ISBN 039526619X. 

Notes

  1. ^ Called "light" in Stokes Field Guide to Birds of North America

External links

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