Blue grosbeak
The blue grosbeak, is a medium-sized North American passerine bird in the cardinal family Cardinalidae. It is mainly migratory, wintering in Central America and breeding in northern Mexico and the southern United States. The male is blue with two brown. The female is mainly brown with scattered blue feathers on the upperparts and two brown wing bars.
Taxonomy
The blue grosbeak was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Loxia caerulea. The specific epithet caerulea is the Latin word for "blue", "azure-blue", "sky-blue" or "dark-blue". Linnaeus based his own description on the "blew gross-beak" described and illustrated by Mark Catesby in his The Natural History of Carolina, Florida and the Bahama Islands. The book had been published in 1729–1732. Catesby gave the location as Carolina and Linnaeus specified America. The type location is now restricted to South Carolina.Some taxonomists placed the blue grosbeak in its own monotypic genus Guiraca but in 2001 a molecular phylogenetic study of mitochondrial DNA sequences found that the blue grosbeak, in spite of being physically larger, is nested within Passerina and was most closely related to the lazuli bunting. The species is therefore now placed with the North American buntings in Passerina, a genus that was introduced by the French ornithologist Louis Pierre Vieillot in 1816.
Seven subspecies are recognized:
- P. c. caerulea – southeast and south central USA
- P. c. interfusa – west central USA and north Mexico
- P. c. salicaria – southwest USA and northwest Mexico
- P. c. eurhyncha – central and south Mexico
- P. c. chiapensis – south Mexico to Guatemala
- P. c. deltarhyncha – west Mexico
- P. c. lazula – south Guatemala to northwest Costa Rica
Description
Distribution and habitat
This is a migratory bird, with nesting grounds across most of the southern half of the United States and much of northern Mexico, migrating south to Central America and in very small numbers to northern South America; the southernmost record comes from eastern Ecuador.This species is found in partly open habitat with scattered trees, riparian woodland, scrub, thickets, cultivated lands, woodland edges, overgrown fields, or hedgerows.