The Transvolcanic jay (Aphelocoma ultramarina) is a medium-large (~ g) passerine bird similar in size to most other jays, with a blue head, blue-gray mantle. Scientific Name: Aphelocoma ultramarina (Bonaparte, ). Common Name(s). English, –, Ultramarine Jay, Transvolcanic Jay. Click here for more information about the Red List categories and criteria. Justification of Red List category. This species has a very large range, and hence does.

Author: Najora Zologar
Country: Latvia
Language: English (Spanish)
Genre: Travel
Published (Last): 23 January 2007
Pages: 318
PDF File Size: 5.67 Mb
ePub File Size: 16.91 Mb
ISBN: 790-5-52204-656-8
Downloads: 84778
Price: Free* [*Free Regsitration Required]
Uploader: Shakale

Recommended Citation

Its range somewhat overlaps with the western scrub-jays, but, where they co-occur, the two species seem to show ecological and morphological apyelocoma displacement Curry et al. Corvus ultramarinus Avibase ID: They do most of their insect hunting in the warmer months while in July they might visit the flowers of the Parry Agave Agave parryi for nectar and insects and then through December take acorns and pinyon nuts from trees.

The Transvolcanic jay inhabits montane forest in the Transvolcanic Belt of central Mexico. It feeds largely on acorns and pine nutsbut includes many other plant and animal foods in its diet. It is most readily distinguished from the similar western scrub jay by the plain unstreaked throat and breast, and the mantle aphelocpma less with the head and wings.

This change also takes place in females, with first year females averaging g in June and fourth year females averaging g. Corvus ultramarinus Bonaparte, Temascaltepec, Mexico.

Smallish jay, no crest, bluish above and dingy greyish white below, with relatively heavy, pointed bill To register to myAvibase click here.


Transvolcanic jay

Hatching has been mostly observed in the morning with the female either eating or just taking away the pieces of shell that end up in the nest. In Maythe American Ornithologists’ Union voted to split the Mexican jay into two species, one retaining the common name Mexican jay and one called the Transvolcanic jay. You must be logged in to view your sighting details.

Most of their foraging takes place on ultramrina ground for insects or stored food but they also search the foliage for caterpillars and acorns. Transvolcanic Yltramarina is similar to Mexican Jay Aphelocoma wollweberiand indeed until recently Transvolcanic Jay was classified as a subspecies group of Mexican.

In Arizona, eggs were pale green in color but a pale blue with brown speckling in Texas. You must be logged in to view your sighting details.

Transvolcanic Jay Aphelocoma ultramarina Bonaparte, Similar to Eastern group but larger in most features. Perisoreus Grey jay P. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a now extinct synapsid ancestor; the fossil record does not distinguish these possibilities. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

Aphelocoma [ultramarina or wollweberi] (Transvolcanic or Mexican Jay) – Avibase

Avibase has been visited , times since 24 June The bill of adult Transvolcanic Jay is black, but the bill of the fledgling is pale pinkish or yellowishand may take up to three years to turn completely black.

Plain, speckled, and even white eggs have been observed in a single study area McCormack and Berg The mating system of Mexican Jays seems rigid but in fact is quite flexible. On the other hand, Mexican jays in Arizona – also arid habitat – have a washed-out appearance, in accordance with Gloger’s rule.


Avibase checklists Search Avibase search Browse by families Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.

Translate Avibase is also available in the following languages: Young are fed mostly insects and some acorn pieces. There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.

Corvus ultramarinus Avibase ID: Bird checklists – taxonomy – distribution – maps – links. In eastern populations Texas birds are more typically territorial. Key Behaviors flies motile sedentary territorial social Communication and Perception Perception Channels visual tactile acoustic chemical Food Habits Mexican Jays mainly eat acorns August through Marchpinyon nuts October through springand arthropods in the winter while in the summer they stick mostly with grasshoppers, crickets, caterpillars, other medium- and large-size insects, and lizards.

Genetic breaks in mitochondrial and microsatellite DNA occur abruptly between the groups, indicating some barriers to genetic exchange McCormack et al.