Blue grosbeak

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Blue grosbeak
Blue Grosbeak by Dan Pancamo.jpg
Adult male
Blue Grosbeak female RWD2.jpg
Adult female
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Cardinalidae
Genus: Passerina
Species:
P. caerulea
Binomial name
Passerina caerulea
Passerina caerulea map.svg
  Breeding
  Migration
  Year-round
  Nonbreeding
Synonyms
  • Loxia caeruleaLinnaeus, 1758
  • Guiraca caerulea(Linnaeus, 1758)

The blue grosbeak (Passerina caerulea), 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 wing bars . The female is mainly brown with scattered blue feathers on the upperparts and two brown wing bars.

Contents

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. [2] The specific epithet caerulea is the Latin word for "blue", "azure-blue", "sky-blue" or "dark-blue". [3] 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. [4] Catesby gave the location as Carolina and Linnaeus specified America. The type location is now restricted to South Carolina. [5]

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, nested within the Passerina and was most closely related to the lazuli bunting. [6] 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. [7] [8]

Seven subspecies are recognised: [8]

Description

The male blue grosbeak is deep blue, with both black and brown on its wings. The female is mostly brown. Both sexes are distinguished by their large, deep bill and double wing bars. These features, as well as the grosbeak's relatively larger size, distinguish this species from the indigo bunting. Length can range from 14 to 19 cm (5.5 to 7.5 in) and wingspan is from 26 to 29 cm (10 to 11 in). [9] [10] Body mass is typically from 26 to 31.5 g (0.92 to 1.11 oz). [11]

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.

Behaviour and ecology

Breeding

The blue grosbeak nests in a low tree or bush or a tangle of vegetation, usually about 1–2.5 m (3.3–8.2 ft) above ground, often at the edge of an open area. [12]

Feeding

It eats mostly insects, but it will also eat snails, spiders, seeds, grains, and wild fruits. The blue grosbeak forages mainly on the ground. [13]

Related Research Articles

<span class="mw-page-title-main">Bunting (bird)</span> Genus of birds

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<span class="mw-page-title-main">Painted bunting</span> Species of bird native to North America

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In the 10th edition of Systema Naturae, published in 1758, the Swedish naturalist Carl Linnaeus described 554 species of bird and gave each a binomial name.

References

  1. BirdLife International (2018). "Passerina caerulea". IUCN Red List of Threatened Species . 2018: e.T22723939A132170886. doi: 10.2305/IUCN.UK.2018-2.RLTS.T22723939A132170886.en . Retrieved 13 November 2021.
  2. Linnaeus, Carl (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Vol. 1 (10th ed.). Holmiae (Stockholm): Laurentii Salvii. p. 175.
  3. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 82. ISBN   978-1-4081-2501-4.
  4. Catesby, Mark (1729–1732). The Natural History of Carolina, Florida and the Bahama Islands (in English and French). Vol. 1. London: W. Innys and R. Manby. p. 39, Plate 39.
  5. Paynter, Raymond A. Jr, ed. (1970). Check-List of Birds of the World. Vol. 13. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 241.
  6. Klicka, J.; Fry, A.J.; Zink, R.M.; Thompson, C.W. (2001). "A cytochrome-b perspective on Passerina bunting relationships". Auk. 118 (3): 610–623. doi: 10.1093/auk/118.3.610 .
  7. Vieillot, Louis Pierre (1816). Analyse d'une Nouvelle Ornithologie Élémentaire (in French). Paris: Deterville/self. p. 30.
  8. 1 2 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (2020). "Cardinals, grosbeaks and (tanager) allies". IOC World Bird List Version 10.2. International Ornithologists' Union. Retrieved 24 September 2020.
  9. "Blue Grosbeak".
  10. "eNature: FieldGuides: Species Detail". Archived from the original on 2012-02-22.
  11. CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN   978-0849342585.
  12. Bent, Arthur Cleveland; Austin, Oliver L. Jr. (1968). "Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies". Bulletin of the United States National Museum. Bulletin of the United States National Museum 237. Washington DC: Smithsonian Institution Press. Part 1 (237): 67–80. doi:10.5479/si.03629236.237.1.
  13. Lowther, P.E.; Ingold, J.L. (2020). Poole, A.F. (ed.). "Blue Grosbeak (Passerina caerulea), version 1.0" . Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.blugrb1.01 . Retrieved 25 September 2020.