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common name applied to some members of the New World family Icteridae, which also includes blackbirds, orioles, meadowlarks, cowbirds, and others. The plumage of the purple, or common, grackle of the Atlantic coastal region is black with metallic hues, iridescent in the sunlight. It feeds on grain and harmful insects, but it is a cannibalistic nest robber. Grackles invade cities and roost in huge flocks. The bronzed grackle, which interbreeds with the purple, is found further inland and W to the Rocky Mts.; in the South are found the Florida and boat-tailed grackles, in Texas and Mexico the great-tailed grackles, or jackdaws. Grackles 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 Icteridae.
References in periodicals archive ?
In 1821, John James Audubon caught a number of common grackles, as well as other birds, to send to Europe.
His team also observed birds in five species--great horned owl, common grackle, house finch, American crow, and house sparrow--picking up the virus just by eating a bit of infected flesh or even infected mosquitoes.
RAMP also performed well with oral swabs from Common Grackles and House Sparrows, although sample sizes were small.
For instance, rates of range expansion in birds over extended periods can average as much as 80 km per year (Wing 1943), and Moore and Dolbeer (1989) suggested that red-winged blackbirds (Agelaius phoeniceus) and common grackles (Quiscalus quiscula) disperse over 100 km per generation.
Oral VecTest performed well for small samples of American Kestrels (Falco sparverius), Northern Cardinals (Cardinalis cardinalis), Common Grackles (Quiscalus quiscula), and House Finches (Carpodacus mexicanus).
Some new perspectives on the breeding ecology of common grackles.
Twenty-three surviving birds had no WNV isolated from tissues at 14 days postinoculation, including three Northern Bobwhite, three Ring-necked Pheasants, three Monk Parakeets, two Budgerigars, one Great Horned Owl, one Mourning Dove, six European Starlings, two Common Grackles, and two Red-winged Blackbirds.