Green jay
| Green jay | ||||||||||||
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Green jay ( Cyanocorax yncas ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Cyanocorax yncas | ||||||||||||
| ( Boddaert , 1783) |
The Grünhäher ( Cyanocorax yncas ), also Inkahäher called, is a bird art from the kind of cyanocorax within the family of crows (Corvidae). It lives in two separate populations, a Central American and a South American, some of which are listed as separate species. There are no green jays between these from Nicaragua to Panama .
features
With a size of 25 to 27 cm, the green jay is one of the smaller blue ravens . Compared to the other representatives of the genus, it has a small, black beak and relatively long tail feathers that become narrower towards the end. The wings are relatively short and rounded. The nasal feathers form a small hood . The forehead and the front parting are light violet and whitish with a hint of color. The stripe of the beard, the cheeks, the top of the head and the nape are purple, the lower edge of the nape is slightly bluish. The throat, the back of the cheeks and the rein and over-eye stripes are black. There is a small purple spot above the eye. The top and wings are green, the belly and underside of the wings are yellow. The tail is dark green, its outer feathers yellow. The legs are reddish-brown, the color of the iris varies from brown to yellow. Both sexes look the same.
Occurrence
The green jay is widespread in Central and South America. However, it does not occur in southern Central America ( El Salvador , Nicaragua , Costa Rica and Panama ). The northern limit of the range is the valley of the southern Rio Grande in the south of the US state Texas . From there it extends along the Gulf of Mexico to Belize and north-central Honduras . The green jay can be found on the Pacific coast from Nayarit to the west of Guatemala . The South American occurrence extends from Colombia to the northwest of Venezuela (east of Sucre ), south through the east of Ecuador , central and eastern Peru to the west of central Bolivia ( La Paz and Cochabamba ).
habitat
The green jay inhabits the lower treetops of the forest and the bushy undergrowth. There he rummages in small groups for food. He lives in the plains and on the slopes of wooded mountains, so z. B. in Mexico up to an altitude of 1,800 m, in the Andes mainly at an altitude of 1,400 to 3,000 m.
nutrition
The diet consists of a large number of invertebrates , such as beetles , earthworms and crickets , but also eggs from lizards and smaller birds, as well as seeds , berries and fruits . A preference for acorns and the seeds of the saw palmetto can also be observed.
Systematics
Some scientists divide the species into two types because of the two separate populations: the northern green jay ( Cyanocorax luxuosus ) and the southern Inca jay ( Cyanocorax yncas ). According to ITIS, in addition to the nominate form C. y. yncas the subspecies C. y. luxury recognized.
swell
Individual evidence
- ↑ Ridgely, RS; & Greenfield, PJ (2001): The Birds of Ecuador - Field Guide. Cornell University Press. ISBN 0-8014-8721-8
- ^ Hilty, SL (2003): Birds of Venezuela. Princeton University Press. ISBN 0-691-02131-7
- ^ Integrated Taxonomic Information System. In: Integrated Taxonomic Information System (ITIS) . Retrieved April 18, 2019 .
- ^ ITIS, the Integrated Taxonomic Information System, accessed on September 28, 2008 [1]
literature
- Steve Madge , Hilary Burn: Crows and Jays. Helmet Identification Guides . A&C Black, 1994, ISBN 0-7136-5207-1 .
- National Geographic Society: Field Guide to the birds of North America. 4th fully rev. and updated Ed., Washington DC 2002, ISBN 0-7922-6877-6
Web links
- Cyanocorax yncas inthe IUCN Red List of Threatened Species 2013.2. Listed by: BirdLife International, 2012. Retrieved March 17, 2014.