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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.

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Transvolcanic Jays occupy pine-oak forests and have large social groups, suggesting that it may be a cooperative breeder; but, in contrast to the northern populations of Mexican Jay in Arizona, which have been studied extensively, little is known about ultramarima biology of Transvolcanic Jay.

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. Taiwan blue magpie U. On the other hand, Mexican jays in Arizona – also arid ultramsrina – have a washed-out appearance, in accordance with Gloger’s rule.

Transvolcanic jay

Females usually begin incubation after the third or penultimate egg has been laid. Subspecies and Distribution A.

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. Crypsirina Hooded treepie C.

Mexican Jay (Aphelocoma ultramarina)

At fledging, which occurs 24 to 28 days after hatching, young jays can actively fly for a few meters before gliding down. Handbook of the Birds of the World Alive. Accessed May 8, at http: It has a cooperative breeding system similar to that of the related Florida scrub-jaywith several birds helping at a nest; these ” helpers ” are usually immature offspring of the dominant pair from the previous 1—2 years, but also include apparently unrelated flock members.


In South America it includes the scrub ecotone between forest and paramo. Jltramarina Arizona, eggs were pale green in color but a pale blue with brown speckling in Texas.

Translate Avibase is also available in the following languages: Retrieved 26 November Show Details Hide Details. Smallish jay, no crest, bluish above and dingy greyish white below, with relatively heavy, pointed bill Similar to Eastern group but larger in most features. You must be logged in to view your sighting details. To register to myAvibase click here. Mexican Jays are found in habitats usually containing pine Pinus spp.

Mexican Jays are greyish blue above and dirty white to ashy-grey below. Eggs are pale green-blue and unspeckled, unlike Eastern group where speckled eggs are common.

Mexican jay

Iteroparous animals must, by definition, survive over multiple seasons or periodic condition changes. Until recently considered conspecific with A. Avibase has been visited , times since 24 June Helpers are offspring from previous years. Accessed December 31, at https: It resembles the western scrub jaybut has an unstreaked throat and breast.

Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. However, they are omnivorous in all seasons and their diet includes a wide variety of plant and animal matter, including invertebrates, small amphibians and reptiles, and birds’ eggs and nestlings McCormack and Brown Hatchlings start out begging vertically and randomly and eventually learn to detect an approaching feeder.

Adults have a black bill while juveniles retain a pale orange lower mandible through their first year and sometimes similar spots in their second year.


You must be logged in to view your sighting details. The ADW Team gratefully acknowledges their support. Young are hatched without feathers and with their eyes closed. Key Behaviors flies motile sedentary territorial social Communication and Perception Perception Channels visual tactile acoustic chemical Yltramarina Habits Mexican Jays ahelocoma 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.

Your sightings No sightings Add to a lifelist: Transvolcanic Jay Aphelocoma ultramarina Bonaparte, Corvus ultramarinus Avibase ID: Both male and female coloration is similar. Login or Subscribe to get access to a lot of extra features!

Aphelocoma wollweberi Kaup They are fed over entire nesting period and several weeks after fledging. Genetic breaks in mitochondrial and microsatellite DNA occur abruptly between the groups, indicating some barriers to genetic exchange McCormack et al. Its range somewhat overlaps with the western ultramsrina, but, where they co-occur, the two species seem to show ecological and morphological character displacement Curry et al.

Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts.

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