Orchard oriole

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Orchard oriole
Orchard Oriole by Dan Pancamo 1.jpg
Adult male I. s. spurius
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Icteridae
Genus: Icterus
Species:
I. spurius
Binomial name
Icterus spurius
(Linnaeus, 1766)
Icterus spurius map.svg
Range of I. spurius
  Breeding range
  Wintering range
Synonyms

Oriolus spuriusLinnaeus, 1766

male, Guatemala Orchard oriole (Icterus spurius) male Los Tarrales.jpg
male, Guatemala

The orchard oriole (Icterus spurius) is the smallest species of icterid. The subspecies of the Caribbean coast of Mexico, I. s. fuertesi, is sometimes considered a separate species, the ochre oriole or Fuertes's oriole.

Contents

The orchard oriole is a small bird with a length of 5.9-7.1 inches, a weight of 0.6-1.0 ounces, and a wingspan of 9.8 inches. Adult males have chestnut or ochre underparts, while adult females and juveniles have olive-green upper parts and yellowish breasts and bellies. They inhabit semi-open areas with deciduous trees in eastern North America, southern Tamaulipas, and Veracruz. Their winter range extends from central Sinaloa and southern Veracruz to northern Colombia and northwestern Venezuela.

Orchard orioles prefer living near lakes and streams, nesting in tightly woven pouches attached to horizontal tree branches. They are nocturnal migrants and feed on insects, spiders, fruit, nectar, and seeds depending on the season. During flight, they usually swoop close to the ground and fly at or below treetop level. Courtship displays include bowing, seesawing, and begging. The species name "spurius" refers to their original misidentification as female Baltimore orioles, and they are sometimes mistaken for New World warblers.

Description

First-year male in New York City Juvenile orchard oriole in GWC (12190).jpg
First-year male in New York City
Female on milkweed plant, Delaware Orchard oriole bombay hook nwr 6.13.22 DSC 2650.jpg
Female on milkweed plant, Delaware

Measurements: [2]

The bill is pointed and black with some blue-gray at the base of the lower mandible. [3] The adult male of the nominate subspecies has chestnut on the underparts, shoulder, and rump, with the rest of the plumage black. In the subspecies I. s. fuertesi, the chestnut is replaced with ochre. [3] The adult female and the juvenile of both subspecies have olive-green on the upper parts and yellowish on the breast and belly. All adults have pointed bills and white wing bars. (Orchard orioles are considered to be adults after their second year.[ citation needed ]) One-year-old males are yellow-greenish with black lores and bib. [3]

Habitat and range

The breeding habitat is semi-open areas with deciduous trees. I. s. spurius breeds in spring across eastern North America from near the Canada–United States border south to central Mexico. A 2009 study also found breeding in the thorn forest of Baja California Sur and the coast of Sinaloa during the summer "monsoon"; this region had previously been thought to be only a migratory stopover. [4] I. s. fuertesi breeds from southern Tamaulipas to Veracruz. [3] There is a record of a specimen of fuertesi from Cameron County, Texas. [5] :815 These birds prefer living in shaded trees within parks along lakes and streams. The nest is a tightly woven pouch attached to a fork on a horizontal branch. Their nests tend to sit close together.

The nominate subspecies' winter range extends from the coastal lowlands of central Sinaloa and southern Veracruz south to northern Colombia and northwestern Venezuela (Scharf and Kren 1996). The ochre subspecies has been observed in winter on the Pacific slope of Mexico. [3]

Nominate orchard orioles depart from their winter habitats in March and April and arrive in their breeding habitats from late April to late May. Usually, they leave their breeding territories in late July and early August and arrive on their winter territories in mid August. These birds are nocturnal migrants.

Diet

While in breeding season, they eat insects and spiders. When the season changes, their diet also includes ripe fruit, which quickly passes through their digestive tract. During the winter, their diet consists of fruit, nectar, insects and seeds.

Behavior

When in flight, orchard orioles generally swoop close to the ground and fly at or below treetop level.

During courtship, females display themselves in three ways. The first is by bowing their head and torso toward the male. Seesawing, the second courtship display, involves repetitively alternating lowering and raising the head and tail. The third display is begging, which is fast-paced fluttering of wings halfway extended, followed by a high whistle.[ citation needed ]

Etymology

The specific name spurius refers to the original misidentification of the male as a female Baltimore oriole. These birds are sometimes mistakenly identified as New World warblers.

Related Research Articles

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References

  1. BirdLife International (2016). "Icterus spurius". IUCN Red List of Threatened Species . 2016: e.T103793298A94850686. doi: 10.2305/IUCN.UK.2016-3.RLTS.T103793298A94850686.en . Retrieved 18 November 2021.
  2. "Orchard Oriole Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-30.
  3. 1 2 3 4 5 Howell, Steve N.G.; Webb, Sophie (1995). "American Blackbirds and Orioles: Icteridae". A Guide to the Birds of Mexico and Northern Central America. Oxford University Press. pp. 744–745. ISBN   0-19-854013-2.
  4. Rohwer, Sievert; Hobson, Keith A.; Rohwer, Vanya (2009). "Migratory double breeding in Neotropical migrant birds". Proceedings of the National Academy of Sciences. 106 (45): 19050–19055. Bibcode:2009PNAS..10619050R. doi: 10.1073/pnas.0908121106 . PMC   2776443 . PMID   19858484.
  5. Oberholser, Harry C. (1974). "Meadowlarks, Blackbirds, and Orioles: Icteridae". In Kincaid, Jr., Edgar B.; Winckler, Suzanne; Rowlett, John L. (eds.). The Bird Life of Texas. Vol. 2. Paintings by Louis Agassiz Fuertes. University of Texas Press. pp. 802–844. ISBN   0-292-70711-8. LCCN   73-21216.