Eastern meadowlark

Source: Wikipedia, the free encyclopedia.

Eastern meadowlark
S. m. mexicana
Belize
Song

Near Threatened  (IUCN 3.1)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Icteridae
Genus: Sturnella
Species:
S. magna
Binomial name
Sturnella magna
S. magna range
  Breeding range
  Year-round range
Synonyms

Alauda magna Linnaeus, 1758

The eastern meadowlark (Sturnella magna) is a medium-sized blackbird (family:

conspecific
with the eastern meadowlark.

Taxonomy

The eastern meadowlark was

type location was restricted to South Carolina by the American Ornithologist's Union in 1931.[4][5] The eastern meadowlark is now placed with the western meadowlark and Chihuahuan meadowlark in the genus Sturnella that was introduced in 1816 by the French ornithologist Louis Pierre Vieillot.[6][7] The name Sturnella is a diminutive of the Latin sturnus meaning "starling".[8]

Fourteen subspecies are recognised:[7]

  • S. m. magna (Linnaeus, 1758) – southeast Canada and central, east USA
  • S. m. argutula Bangs, 1899 – south-central, southeast USA
  • S. m. hoopesi Stone, 1897 – south Texas (south-central USA) and northeast Mexico
  • S. m. saundersi Dickerman & Phillips, AR, 1970 – southeast Oaxaca (south Mexico)
  • S. m. alticola Nelson, 1900 – south Mexico to Costa Rica
  • S. m. mexicana Sclater, PL, 1861 – southeast Mexico to Belize and Guatemala
  • S. m. griscomi Van Tyne & Trautman, 1941 – north Yucatán (southeast Mexico)
  • S. m. inexspectata Ridgway, 1888 – Honduras and northeast Nicaragua
  • S. m. subulata Griscom, 1934 – Panama
  • S. m. meridionalis Sclater, PL, 1861 – north-central Colombia to northwest Venezuela
  • S. m. paralios Bangs, 1901 – north Colombia and north, central Venezuela
  • S. m. praticola Chubb, C, 1921 – llanos of east Colombia and southeast Venezuela to Guyana and Suriname
  • S. m. monticola Chubb, C, 1921 – montane south Venezuela, the Guianas and north Brazil
  • S. m. hippocrepis (Wagler, 1832) – Cuba

The list of subspecies formerly included S. m. lilianae and S. m. auropectoralis. These are now considered to be a separate species, the Chihuahuan meadowlark. The split was based on a study published in 2021 that showed that there were significant morphological, vocal and genomic differences between these two taxa and the other subspecies of the eastern meadowlark.[7][9][10]

Description

The adult eastern meadowlark measures from 19 to 28 cm (7.5 to 11.0 in) in length and spans 35–40 cm (14–16 in) across the wings.

culmen measures 2.8–3.7 cm (1.1–1.5 in) and the tarsus measures 3.6–4.7 cm (1.4–1.9 in). Females are smaller in all physical dimensions.[14]
Adults have yellow underparts with a black "V" on the breast and white flanks with black streaks. The upperparts are mainly brown with black streaks. They have a long pointed bill; the head is striped with light brown and black.

The song of this bird is of pure, melancholy whistles, and thus simpler than the jumbled and flutey song of the western meadowlark; their ranges overlap across central North America. In the field, the song is often the easiest way to tell the two species apart, though plumage differences do exist, like tail pattern and malar coloration.

The pale Chihuahuan meadowlark of northern Mexico and the southwestern US is split off as a separate species.

Distribution and habitat

Their breeding habitat is grasslands and prairie, also pastures and hay fields. This species is a permanent resident throughout much of its range, though most northern birds migrate southwards in winter.[15] In 1993 this species was first recorded in El Salvador, and the discovery of a breeding pair in 2004 confirmed that the species is a resident there.[16]

Behavior and ecology

Breeding

Nesting occurs throughout the summer months. The nest is also on the ground, covered with a roof woven from grasses. There may be more than one nesting female in a male's territory. Nests are placed on the ground in depressions 1 to 3 inches deep, such as in the hoofprints of cattle, in pastures, meadows, hay fields, and on the edges of marshes. The nests are made of dried grass and plant stems, and are lined with grass lespedezas, pine needles, or horse hair.[17]

The Cuban subspecies S. m. hippocrepis (Wagler, 1832) is small and more streaked below, and may be a separate species

Food and feeding

These birds forage on the ground or in low vegetation, sometimes probing with the bill. They mainly eat arthropods, but also seeds and berries. In winter, they often feed in flocks. About three-quarters of the eastern meadowlark's diet is from animal sources like beetles, grasshoppers, and crickets. They also eat grain and seeds.[17]

Conservation status

The numbers of this species increased as forests were cleared in eastern North America. This species is ideally suited to farmland areas, especially where tall grasses are allowed to grow. Their numbers are now shrinking with a decline in suitable

Pacific (western) side of the continent, in agricultural-type areas.[16]

Eastern meadowlarks are species at risk in Nova Scotia and the subject of agricultural conservation program seeking to reduce mortality through modified practices.[19] Allowing marginal areas of fields on farms to seed with grass can provide nesting habitat for meadowlarks and all grassland birds. Delaying hay harvest can also improve survival, giving young meadowlarks a chance of fledging [20]

Gallery

  • Juvenile – Panama
    Juvenile – Panama
  • Adult – Panama
    Adult – Panama
  • Eggs of Sturnella magna MHNT
    Eggs of Sturnella magna
    MHNT
  • Juvenile and adult – Maine
    Juvenile and adult – Maine

References

  1. doi:10.2305/IUCN.UK.2020-3.RLTS.T22735434A179984605.en
    . Retrieved 11 November 2021.
  2. ^ a b 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. 167.
  3. ^ 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. 33, Plate 33.
  4. ^ Committee on Classification and Nomenclature (1931). Check-list of North American Birds (4th ed.). Lancaster, Pennsylvania: American Ornithologist's Union. p. 301.
  5. ^ Paynter, Raymond A. Jr, ed. (1968). Check-List of Birds of the World. Vol. 14. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 177.
  6. ^ Vieillot, Louis Pierre (1816). Analyse d'une Nouvelle Ornithologie Élémentaire (in French). Paris: Deterville/self. p. 34.
  7. ^
    Rasmussen, Pamela, eds. (August 2022). "Oropendolas, orioles, blackbirds"
    . IOC World Bird List Version 12.2. International Ornithologists' Union. Retrieved 27 August 2022.
  8. ISBN 978-1-4081-2501-4
    .
  9. doi:10.1093/ornithology/ukab004
    .
  10. doi:10.1093/ornithology/ukac020
    .
  11. ^ "FieldGuides: Species Detail". eNature. Archived from the original on 2012-05-17. Retrieved 2013-04-01.
  12. ISBN 978-0849342585
    .
  13. ^ "Eastern Meadowlark, Life History, All About Birds – Cornell Lab of Ornithology". Allaboutbirds.org. Retrieved 2013-04-01.
  14. ISBN 978-0713643336
  15. Wilson Bulletin
    . 18 (2): 47–60.
  16. ^ a b Herrera, Néstor; Rivera, Roberto; Ibarra Portillo, Ricardo & Rodríguez, Wilfredo (2006): Nuevos registros para la avifauna de El Salvador. ["New records for the avifauna of El Salvador"]. Boletín de la Sociedad Antioqueña de Ornitología 16 (2): 1–19. [Spanish with English abstract] PDF fulltext
  17. ^ a b Terres, John K. (1980). The Audubon Society Encyclopedia of North American Birds. New York: Alfred A. Knopf. p. 941.
  18. ^ "All About Birds: Eastern Meadowlark". Cornell Laboratory of Ornithology. Retrieved 2008-08-13.
  19. ^ "Eastern Meadowlark - Biodiversity Landowner Guide". Archived from the original on 2015-07-17. Retrieved 2015-07-16.
  20. ^ "Delay Haying - Biodiversity Landowner Guide". Archived from the original on 2015-07-17. Retrieved 2015-07-16.

External links

Wikimedia Commons has media related to Eastern meadowlark.
Wikispecies has information related to Sturnella magna.


Retrieved from "https://en.wikipedia.org/w/index.php?title=Eastern_meadowlark&oldid=1209461134"