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Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies, choughs, and nutcrackers. In common English, they are known as the crow family, or, more technically, corvids. Over 120 species are described. The genus Corvus, including the jackdaws, crows, rooks, and ravens, makes up over a third of the entire family. Corvids are the largest passerines.
The Eurasian jay is a species of bird occurring over a vast region from Western Europe and north-west Africa to the Indian Subcontinent and further to the eastern seaboard of Asia and down into south-east Asia. Across its vast range, several very distinct racial forms have evolved to look very different from each other, especially when forms at the extremes of its range are compared.
Jays are several species of medium-sized, usually colorful and noisy, passerine birds in the crow family, Corvidae. The names jay and magpie are somewhat interchangeable, and the evolutionary relationships are rather complex. For example, the Eurasian magpie seems more closely related to the Eurasian jay than to the East Asian blue and green magpies, whereas the blue jay is not closely related to either.
The blue jay is a passerine bird in the family Corvidae, native to North America. It resides through most of eastern and central United States, although western populations may be migratory. Resident populations are also found in Newfoundland, Canada, while breeding populations can be found across southern Canada. It breeds in both deciduous and coniferous forests, and is common in residential areas. It is predominantly blue with a white chest and underparts, and a blue crest; it has a black, U-shaped collar around its neck and a black border behind the crest. Males and females are similar in size and plumage, and plumage does not vary throughout the year. Four subspecies of the blue jay have been recognized.
The Steller's jay is a jay native to western North America, closely related to the blue jay found in the rest of the continent, but with a black head and upper body. It is also known as the long-crested jay, mountain jay, and pine jay. It is the only crested jay west of the Rocky Mountains. It is also sometimes colloquially called a "blue jay" in the Pacific Northwest, but is distinct from the blue jay of eastern North America.
The passerine birds of the genus Aphelocoma include the scrub-jays and their relatives. They are New World jays found in Mexico, western Central America and the western United States, with an outlying population in Florida. This genus belongs to the group of New World jays–possibly a distinct subfamily–which is not closely related to other jays, magpies or treepies. They live in open pine-oak forests, chaparral, and mixed evergreen forests.
The green jay is a species of the New World jays, and is found in Central America. Adults are about 27 cm (11 in) long and variable in colour across their range; they usually have blue and black heads, green wings and mantle, bluish-green tails, black bills, yellow or brown eye rings, and dark legs. The basic diet consists of arthropods, vertebrates, seeds, and fruit. The nest is usually built in a thorny bush; the female incubates the clutch of three to five eggs. This is a common species of jay with a wide range and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
Cyanocorax is a genus of New World jays, passerine birds in the crow family, Corvidae. The generic name is derived from the Greek words κυανος (kuanos), meaning "dark blue," and κοραξ (korax), meaning "raven".
The brown jay is a large American jay which has the habitus of a magpie, but is slightly smaller and with a shorter tail, though the bill is larger.
The Canada jay, also gray jay, grey jay, camp robber, or whisky jack, is a passerine bird of the family Corvidae. It is found in boreal forests of North America north to the tree line, and in the Rocky Mountains subalpine zone south to New Mexico and Arizona. A fairly large songbird, the Canada jay has pale grey underparts, darker grey upperparts, and a grey-white head with a darker grey nape. It is one of three members of the genus Perisoreus, a genus more closely related to the magpie genus Cyanopica than to other birds known as jays. The Canada jay itself has nine recognized subspecies.
The curl-crested jay is a jay from South America.
The black-chested jay is a species of bird in the family Corvidae.
The violaceous jay is a species of bird in the family Corvidae, the crows and their allies.
The Yucatan jay is a species of bird in the family Corvidae, the crows and their allies. It is native to the Yucatán Peninsula where its habitats are subtropical or tropical dry forest, plantations and cleared areas at altitudes up to 250 m (820 ft). Adults are about 30 cm (12 in) long, black, with blue wings, mantle, and tail, black bills, yellow eye rings and legs. Immature birds have yellow bills. This is a common species of jay with a wide range and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
The azure-hooded jay is a species of bird in the family Corvidae. It is found in Middle America. Its natural habitat is subtropical or tropical moist montane forest. This species is known to have four subspecies. It is 11 to 12 inches in length and is dark blue with a black head and upper chest. The back of the head and neck are sky blue with a white border.
The turquoise jay is a species of bird in the family Corvidae.
The Pander's ground jay, grey ground jay or Turkestan ground-jay is a species of bird in the crow and jay family, Corvidae. It is found in central Asia, particularly Kazakhstan, Turkmenistan, and Uzbekistan. It is closely related to the Persian ground-jay of Iran. Its natural habitat is sandy desert with low shrub cover. It also forages around human settlements and roads.
The Florida scrub jay is one of the species of scrub jay native to North America. It is the only species of bird endemic to the U.S. state of Florida and one of only 15 species endemic to the continental United States. Because of this, it is heavily sought by birders who travel from across the country to observe this unique species. It is known to have been present in Florida as a distinct species for at least 2 million years, and is possibly derived from the ancestors of Woodhouse's scrub jay.
The pinyon jay, historically known as the blue crow or Maximilian's jay, is a jay between the North American blue jay and the Eurasian jay in size. It is the only member of the genus Gymnorhinus. Its overall proportions are very nutcracker-like and indeed this can be seen as convergent evolution as both birds fill similar ecological niches. The pinyon jay is a bluish-grey coloured bird with deeper head colouring and whitish throat with black bill, legs and feet.
Woodhouse's scrub jay, is a species of scrub jay native to western North America, ranging from southeastern Oregon and southern Idaho to central Mexico. Woodhouse's scrub jay was until recently considered the same species as the California scrub jay, and collectively called the western scrub jay. Prior to that both of them were also considered the same species as the island scrub jay and the Florida scrub jay; the taxon was then called simply the scrub jay. Woodhouse's scrub jay is nonmigratory and can be found in urban areas, where it can become tame and will come to bird feeders. While many refer to scrub jays as "blue jays", the blue jay is a different species of bird entirely. Woodhouse's scrub jay is named for the American naturalist and explorer Samuel Washington Woodhouse.
References
- ↑ Gray, Mary Taylor (1998). The Guide to Colorado Birds. Englewood, CO, US: Westcliffe Publishers. p. 154. ISBN 978-1-56579-283-8.
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