Crown chamber
| Crown chamber | ||||||||||||
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Crown Chamber ( Zonotrichia atricapilla ) |
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| Scientific name | ||||||||||||
| Zonotrichia atricapilla | ||||||||||||
| ( Gmelin , 1789) |
The crown chamber ( Zonotrichia atricapilla ) is a monotypical songbird species from the family of the New World chambers. It occurs in northern North America. This Ammernart is classified by the IUCN as safe ( least concern ).
Appearance
The crown chamber reaches a body length of 15 to 18 centimeters. The wingspan is 22 to 25 centimeters. The weight varies between 22 and 35 grams.
The crown chamber is a generally inconspicuous bunting. The only striking feature in the magnificent dress is the yellow strip on the head, which looks like a crown and from which it owes its name. It is surrounded on both sides by a dark stripe that extends to the eyes and the neck. The neck and the rest of the head are gray. The upper beak is dark gray-brown, the lower beak is a bit lighter and looks yellowish in some individuals. The iris is brown. The underside of the body is gray, the flanks are reddish brown. The under tail cover is white.
In the plain dress , the dark stripes that border the yellow crown stripe are narrower and paler. The feet and legs are then pink-brown. Fledglings are similar to the adult ones, but the apex is reddish brown.
It can be confused with the badger bunting and the harris bunting . However, both have pink beaks.
Distribution area
The crown chamber is a Nearctic species that breeds in the Aleutian Islands and western Alaska . The crown chamber is rare in the central area of Alaska and only occurs exceptionally in northern Alaska. The distribution area extends over the west of Canada to British Columbia . Their habitat are thickets on the edge of the forest. The crown chamber is a migratory bird that migrates to the west coast of the United States during the winter months.
Way of life
The crown chamber is an omnivore that eats buds, seeds, and arthropods . Crown chambers are sociable during migration and in winter. In the breeding area, the males defend a breeding area. Crown chambers enter into a monogamous pair bond, which presumably only exists for one reproductive period. The nest is in thickets. It is built from grass and small twigs, the nesting trough is covered with grass and hair. Presumably it is erected by the female alone. The clutch consists of three to four eggs. These are light brown or pale greenish and mottled reddish brown. The breeding season is 11 to 13 days. Only the female parent bird breeds. The nestlings fledge after nine to eleven days. Crown chambers reproduce for the first time at the age of one year.
supporting documents
literature
- Richard Sale: A Complete Guide to Arctic Wildlife. Christopher Helm Publisher, London 2006, ISBN 0-7136-7039-8 .
Single receipts
Web links
- Zonotrichia atricapilla inthe IUCN Red List of Threatened Species 2012.2. Listed by: BirdLife International, 2012. Retrieved April 22, 2013.