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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Young start out on average at 6 g at hatching and can reach g in 18 to 20 days.
Some field guides misreport this color as yellow aphleocoma the pale bill becomes yellow in museum study skins. Eggs are laid in late March through April ranging from one to six eggs with four and five being most common clutch size. Ghiandaia messicana, Ghiandaia pettogrigio Japanese: The mating system of Mexican Jays seems rigid but in fact is quite flexible.
In South America it includes the scrub ecotone between forest and paramo. Until recently considered conspecific with A. This change also takes place in females, with first year females averaging g in June and fourth year females averaging g.
All members of a breeding group participate in rearing offspring.
The Academy of Natural Sciences. Cissa Common green magpie C. Genetic breaks in mitochondrial and microsatellite DNA occur abruptly between the groups, indicating some barriers to genetic exchange McCormack et al.
Foraging in groups allows for a higher success rate; sharing can occur.
Login or Subscribe to get access to a lot of extra features! To cite this page: Mexican Jays mainly eat acorns August through Marchpinyon nuts October through springand arthropods in the winter while in ulrramarina summer they stick mostly with grasshoppers, crickets, caterpillars, other medium- and large-size insects, and lizards.
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.
Males do not incubate. Mexican Jays are found in habitats usually containing pine Pinus spp. They are fed over entire nesting period and several weeks after fledging. California scrub jay A. Perisoreus Grey jay P.
Second and even third clutches have been observed although for the most part they were replacement clutches and were smaller than first apheloxoma. Pica Black-billed magpie P. Corvus Australian and Melanesian species Little crow C.
To register to myAvibase click here. Checklists There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages.
Vegetation is dominated by stands of dense, spiny shrubs with tough hard or waxy evergreen leaves. Biddulph’s ground jay P. Crypsirina Hooded treepie C. In Maythe American Ornithologists’ Union voted to split aphelicoma Mexican jay into two species, one retaining the common name Mexican jay and one called the Transvolcanic jay.
Lower back, rump, tail and wings blue.
Aphelocoma [ultramarina or wollweberi] (Transvolcanic or Mexican Jay) – Avibase
Related taxa Other synonyms Catalan: Mexican jays do not seem to follow Gloger’s rule either, as populations in arid habitat in southwestern Texas are very blue. 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 the biology of Ultramarija Jay.
Bibliography Only subscribers are able to see the bibliography. Generally similar to those of A.
aphelocoja For the most part, unpaired males start to build a nest in order to attract an unpaired female in their group. As with most birds, mass varies depending on age and season, with first year males averaging g in June to fourth year males that weigh in at g.
Ultramarine Jay (Aphelocoma ultramarina) | HBW Alive
The Transvolcanic jay inhabits montane forest in the Transvolcanic Belt of central Ultranarina. Checklists There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages. Jays have died by eating corn kernels from a garden laced with fungicides, by finding pesticides in storage areas, and through collisions with motor vehicles.