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Birds' scales are found mainly on the toes and metatarsus, but may be found further up on the ankle in some birds. The scales and scutes of birds were thought to be homologous to those of reptiles, [4] but are now agreed to have evolved independently, being degenerate feathers. [5] [6]
Longisquama means "long scales"; the specific name insignis refers to its small size. The Longisquama holotype is notable for a number of long structures that appear to grow from its skin. The current opinion is that Longisquama is an ambiguous diapsid and has no bearing on the origin of birds .
The scales of birds are composed of the same keratin as beaks, claws, and spurs. They are found mainly on the toes and metatarsus, but may be found further up on the ankle in some birds. Most bird scales do not overlap significantly, except in the cases of kingfishers and woodpeckers.
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The California quail is the official state bird of California. This list of birds of California is a comprehensive listing of all the bird species seen naturally in the U.S. state of California as determined by the California Bird Records Committee (CBRC). [1] Additional accidental and hypothetical species have been added from different sources.
Chukar Patridge from United Arab Emirates. The chukar partridge (Alectoris chukar), or simply chukar, is a Palearctic upland gamebird in the pheasant family Phasianidae.It has been considered to form a superspecies complex along with the rock partridge, Philby's partridge and Przevalski's partridge and treated in the past as conspecific particularly with the first.
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The birds formerly bred on Ascension Island itself, but the colonies were exterminated by feral cats introduced in 1815. The birds continued to breed on a rocky outcrop just off the shore of the island. A program conducted between 2002 and 2004 eradicated the feral cats [67] and a few birds have returned to nest on the island. [68] [69]