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Sexes similar. Juveniles are duller than adults, have brown eyes and a yellow bill. | Sexes similar. Juveniles are duller than adults, have brown eyes and a yellow bill. | ||
====Similar species==== | ====Similar species==== | ||
| + | Most likely to be confused with [[Purplish-backed Jay]] which it overlaps in the northern part of its range (especially around San Blas where Purplish-backed is the more frequently encountered). San Blas Jay is around 1-5 cm smaller, with a more contrasting lighter blue back colour. Its legs are a paper yellow or (or more usually) grey. | ||
| + | |||
Similar to [[Bushy-crested Jay]] (especially subspecies ''chavezi'') and [[Yucatan Jay]] but ranges don't overlap. | Similar to [[Bushy-crested Jay]] (especially subspecies ''chavezi'') and [[Yucatan Jay]] but ranges don't overlap. | ||
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==Distribution== | ==Distribution== | ||
Endemic to the Pacific coast of southwest [[Mexico]].<br /> | Endemic to the Pacific coast of southwest [[Mexico]].<br /> | ||
Revision as of 15:15, 9 April 2023
Alternative name: Black-and-blue Jay
- Cyanocorax sanblasianus
Identification
27 - 35cm.
- Small frontal crest
- Black head, neck, upper mantle and underparts
- Purplish-blue upperparts, wings and uppertail-coverts (nelsoni less bright than nominate)
- Yellow eye
- Black bill
- Greenish-yellow legs
Sexes similar. Juveniles are duller than adults, have brown eyes and a yellow bill.
Similar species
Most likely to be confused with Purplish-backed Jay which it overlaps in the northern part of its range (especially around San Blas where Purplish-backed is the more frequently encountered). San Blas Jay is around 1-5 cm smaller, with a more contrasting lighter blue back colour. Its legs are a paper yellow or (or more usually) grey.
Similar to Bushy-crested Jay (especially subspecies chavezi) and Yucatan Jay but ranges don't overlap.
Distribution
Endemic to the Pacific coast of southwest Mexico.
A fairly common but patchily distributed restricted-range species.
Taxonomy
Two subspecies accepted:
- C. s. nelsoni from Nayarit, Jalisco and Colima south to western Guerrero
- C. s. sanblasianus in central Guerrero
Formerly placed in genus Cissilopha. May form a superspecies with Yucatan Jay.
Habitat
Found from arid to semi-humid forest and scrub land. Avoids interior of forest.
Behaviour
San Blas Jays are almost exclusively found in flocks of between 15 - 20 birds. They forage low to high in canopy and often on or near the ground. They feed on insects, small lizards and fruits.
Breeding recorded in June and July. Communal breeder, birds hatched during one year will help raising the new brood the following year. The nest is made of twigs and placed 9 - 15m above the ground in a coconut palm. Lays 3 - 4 eggs.
A sedentary species.
References
- Clements, JF. 2008. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2008. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
- Del Hoyo, J, A Elliott, and D Christie, eds. 2009. Handbook of the Birds of the World. Volume 14: Bush-shrikes to Old World Sparrows. Barcelona: Lynx Edicions. ISBN 978-8496553507
Recommended Citation
- BirdForum Opus contributors. (2025) San Blas Jay. In: BirdForum, the forum for wild birds and birding. Retrieved 19 April 2025 from https://www.birdforum.net/opus/San_Blas_Jay
