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 ?
This third group, the "Scottish crossbill," has members with bill and wing sizes which are intermediate between the parrot and common crossbill groups, according to researchers.
Groth for enlightening discussions of crossbill biology, and to G.
"Crossbill populations can reach extraordinary levels in six or eight months," says Curtis Adkisson, professor of biology at Virginia Polytechnic Institute.
An RSPB spokesperson said yesterday: "We found that the Scottish crossbill has a different call to the other types of crossbill that we looked at.
However we did manage to see some great species such as Pallas's Grasshopper Warbler and an influx of Parrot Crossbills, some of which were very tame.
Birds like goshawk, merlin, and crossbill would lose out as a result of deforestation but black grouse would benefit.
With Julian Hughes Crossbill | PICTURE: BEN PORTER EACH week brings a clever bit of birding tech: the latest allows anyone to access 30m bird sightings across Europe, collected each year by 100,000 birdwatchers.
Birds like raven and crossbill will already have young, while other birds will be pairing and setting up territory.
The Glaslyn Wildlife team are preparing to open the public viewpoint and for the long nights of nest protection: it's 2014 yet still a few egg-collectors want to destroy Crossbill Picture: BEN PORTER our natural heritage.
Does it matter that the Scottish Crossbill could one day be as dead as the dodo?
I mentioned a couple of weeks ago that this was perhaps the best year for a long time to find a Two-barred Crossbill in North Wales.
Also among Dyche's rarer eggs were one from a crossbill, three merlin eggs, one of a red-backed shrike, and one of a red-necked phalarope.