Biology:Perisoreus

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The genus Perisoreus is a very small genus of jays from the Boreal regions of North America and Eurasia from Scandinavia to the Asian seaboard. An isolated species also occurs in north-western Sichuan of China. They belong to the Passerine order of birds in the family Corvidae. Species of Perisoreus jays are most closely related to the genus Cyanopica.[1]

The genus was introduced by the French zoologist Charles Lucien Bonaparte in 1831.[2] The type species was subsequently designated as the Canada jay.[3] The name of the genus may come from the Ancient Greek perisōreuō "to heap up" or "bury beneath". Alternatively it may be from the Latin peri- "very" or "exceedingly" and sorix, a bird of augury dedicated to Saturn.[4]

Species

The genus contains three species.[5]

Genus Perisoreus – Bonaparte, 1831 – three species
Common name Scientific name and subspecies Range Size and ecology IUCN status and estimated population
Canada jay

Perisoreus canadensis
(Linnaeus, 1766)

Nine subspecies
  • P. c. albescens
  • P. c. bicolor
  • P. c. canadensis
  • P. c. capitalis
  • P. c. griseus
  • P. c. nigricapillus
  • P. c. obscurus
  • P. c. pacificus
  • P. c. sanfordi
North America north to the tree line, and in the Rocky Mountains subalpine zone south to New Mexico and Arizona
Map of range 		Size:

Habitat:

Diet: 		 LC 


26,000,000[6] Decrease

Siberian jay

Perisoreus infaustus
(Linnaeus, 1758)

Five subspecies
  • P. i. infaustus (Linnaeus, 1758)
  • P. i. rogosowi Sushkin & Stegmann, 1929
  • P. i. opicus Bangs, 1913
  • P. i. sibericus (Boddaert, 1783)
  • P. i. maritimus Buturlin, 1915
north Eurasia
Map of range 		Size:

Habitat:

Diet: 		 LC 


2,130,000-4,150,000[7] Decrease

Sichuan jay

Perisoreus internigrans
(Thayer & Bangs, 1912) 		China Size:

Habitat:

Diet: 		 NT 


12,000 - 20,500[8] Decrease


References

  1. ↑ Ericson, Per G. P.; Jansén, Anna-Lee; Johansson, Ulf S.; Ekman, Jan (2005). "Inter-generic relationships of the crows, jays, magpies and allied groups (Aves: Corvidae) based on nucleotide sequence data". Journal of Avian Biology 36 (3): 222–234. doi:10.1111/j.0908-8857.2001.03409.x. http://www.nrm.se/download/18.4e32c81078a8d9249800021299/Corvidae%5B1%5D.pdf. Retrieved 2017-01-07. 
  2. ↑ Bonaparte, Charles Lucien (1831). "Saggio di una distribuzione metodica degli Animali Vertebrati di Carlo Luciano Bonaparte principe di Musignano". Giornale Arcadico di Scienze, Lettre ed Arti 49: 3–77 [42]. https://biodiversitylibrary.org/page/10034645. 
  3. ↑ Mayr, Ernst; Greenway, James C. Jr, eds (1962). Check-list of birds of the world. 15. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 235. https://biodiversitylibrary.org/page/14485608. 
  4. ↑ Jobling, J.A. (2018). "Key to Scientific Names in Ornithology". in del Hoyo, J.; Elliott, A.; Sargatal, J. et al.. Handbook of the Birds of the World Alive. Lynx Edicions. https://www.hbw.com/dictionary/definition/perisoreus. 
  5. ↑ Gill, Frank; Donsker, David, eds (2018). "Crows, mudnesters, birds-of-paradise". World Bird List Version 8.1. International Ornithologists' Union. http://www.worldbirdnames.org/bow/crows/. 
  6. ↑ BirdLife International. (2018). "Perisoreus canadensis". IUCN Red List of Threatened Species 2018. doi:10.2305/IUCN.UK.2018-2.RLTS.T22705783A130380194.en. https://www.iucnredlist.org/species/22705783/130380194. Retrieved 22 December 2025. 
  7. ↑ BirdLife International. (2024). "Perisoreus infaustus". IUCN Red List of Threatened Species 2024. doi:10.2305/IUCN.UK.2024-2.RLTS.T22705775A264580592.en. https://www.iucnredlist.org/species/22705775/264580592. Retrieved 22 December 2025. 
  8. ↑ BirdLife International. (2022). "Perisoreus internigrans". IUCN Red List of Threatened Species 2022. doi:10.2305/IUCN.UK.2022-1.RLTS.T22705778A209666424.en. https://www.iucnredlist.org/species/22705778/209666424. Retrieved 16 September 2025. 

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