crossbill


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crossbill,

bird of the genus Loxia, in the finchfinch,
common name for members of the Fringillidae, the largest family of birds (including over half the known species), found in most parts of the world except Australia.
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 family. Its bill, crossed at the tips, is specialized for pulling apart pine cones and picking out the seeds. Crossbills are found in the evergreen forests of the Northern Hemisphere, as far south as NW Africa and Guatemala. Two species occur in the United States. The red crossbill (L. curvirostra) is found in Europe and in N and central Asia as well as in North America. Males have orange to dull red plumage, with black wings. The white-winged crossbill (L. leucoptera) occurs in northern Russia and in North America; the male of this species is rosy red and both sexes are marked with white wing bars. Females of both species are olive-gray and yellow; they lay three to four pale green, brown-spotted eggs, in well-formed nests built in trees. Crossbills are not considered migratory, but they shift their breeding grounds erratically, probably in response to the availability of pine cones. Sometimes they suddenly appear in large numbers in areas where they were formerly rarely seen. They are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Aves, order Passeriformes, family Fringillidae.

crossbill

any of various widely distributed finches of the genus Loxia, such as L. curvirostra, that occur in coniferous woods and have a bill with crossed mandible tips for feeding on conifer seeds
References in periodicals archive ?
During a visit to the area (24 [degrees]52'17"N, 100 [degrees]13'53"W) on 17 December 2006, six pairs of adult red crossbills were observed in a snow-covered pine forest at an elevation of 3,722 m.
The primary red feather pigment of male crossbills was found in the birds' liver and blood, which implied that that the carotenoids are synthesized in the liver and then travel to the peripheral tissues via the bloodstream.
Remember, if climate chaos continues the Scottish crossbill will be toast.
Experts examined three different types of crossbill - the common, parrot and Scottish varieties - in order to determine if each breed has distinguishing characteristics.
Crossbills live mainly in Canada and in some northern and western states.
Pine Siskins are one member of a group of birds loosely known as the "winter finches;" other members include redpoll, evening grosbeak, white- winged crossbill, pine grosbeak, and red crossbill.
Opinion has long held the Scottish crossbill to be a breed apart from similar species found in the UK and in other countries.
At times, the red crossbill, a bird that feeds only on conifer seeds, may depend solely on Table Mountain pine seeds.
While we focus on protecting the waters and wetlands, our work also protects the wildlife and birds who call the area home, ranging from amphibians to the black bear and bobcat to the white-winged crossbill and more.
Reproductive endocrinology of a free-living, opportunistically breeding passerine (White-winged Crossbill, Loxia leucoptera).
SPOTTED A common crossbill feeding its young and, right, a black-headed gull, a common sight for pupils taking part in the Big Schools' Birdwatch