Baltimore oriole

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Baltimore oriole
Baltimore Oriole- dorsum.jpg
Adult male
Male Baltimore oriole singing
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Icteridae
Genus: Icterus
Species:
I. galbula
Binomial name
Icterus galbula
Icterus galbula map.svg
Range of I. galbula
  Breeding range
  Wintering range
Note: range in Venezuela, Hispaniola, Puerto Rico, and the rest of the Caribbean not shown
Synonyms
  • Coracias galbulaLinnaeus, 1758
  • Oriolus galbulaLinnaeus, 1766
Baltimore orioles Bird lore (1922) (14747962941)a.jpg
Baltimore orioles

The Baltimore oriole (Icterus galbula) is a small icterid blackbird common in eastern North America as a migratory breeding bird. It received its name from the resemblance of the male's colors to those on the coat-of-arms of 17th-century Lord Baltimore. Observations of interbreeding between the Baltimore oriole and the western Bullock's oriole Icterus bullockii, led to both being classified as a single species, called the northern oriole, from 1973 to 1995. Research by James Rising, a professor of zoology at the University of Toronto, and others showed that the two birds actually did not interbreed significantly. [2]

Contents

The Baltimore oriole is the state bird of Maryland, and the namesake and mascot for the Baltimore Orioles baseball team.

Taxonomy

The Baltimore oriole was formally described in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae under the binomial name Coracias galbula. [3] He specified the type locality as America, but this was restricted to Virginia in 1931. [4] [5] Linnaeus based his account on the "Baltimore-Bird" that had been described and illustrated by the English naturalist Mark Catesby in his The Natural History of Carolina, Florida and the Bahama Islands that was published between 1729 and 1732. [6] The Baltimore oriole is now one of 32 New World orioles placed in the genus Icterus that was introduced in 1760 by the French ornithologist Mathurin Jacques Brisson. The species is monotypic: no subspecies are recognised. [7]

Like all New World orioles, this species is named after an unrelated, physically similar family found in the Old World: the Oriolidae. The word "Oriole" ultimately derives from the Latin aureolus, "golden". [8] The genus name Icterus is from the Ancient Greek ikteros, a yellow bird, usually taken to be the Eurasian golden oriole, the sight of which was thought to cure jaundice. The specific galbula is the Latin name for a yellow bird, again usually assumed to be the golden oriole. [9]

Description

This medium-sized passerine measures 17–22 cm (6.7–8.7 in) in length and spans 23–32 cm (9.1–12.6 in) across the wings. Their build is typical of icterids, as they have a sturdy body, a longish tail, fairly long legs and a thick, pointed bill. The body weight averages 33.8 g (1.19 oz), with a range of weights from 22.3 to 42 g (0.79 to 1.48 oz). [10] The male oriole is slightly larger than the female, although the size dimorphism is minimal by icterid standards. [11] [12] [13] Adults always have white bars on the wings.

The adult male is orange on the underparts, shoulder patch, and rump, with some birds appearing a very deep flaming orange and others appearing yellowish orange. All of the rest of the male's plumage is black. The adult female is yellow brown on the upper parts with darker wings, and dull orange yellow on the breast and belly. The juvenile oriole is similar looking to the female, with males taking until the fall of their second year to reach adult plumage.

Icterus-galbula-002.jpg
Scott's Oriole (33206326043).jpg
Audubon Oriole (Male).jpg
Some adult males (left) may lack the vivid orange coloration associated with the species,[ citation needed ] causing them to strongly resemble the yellow Scott's oriole (center) or similar Audubon's oriole (right)

Distribution and habitat

Adult female Icterus galbula Turpial de Baltimore Baltimore Oriole ( female) (8315125790).jpg
Adult female

Baltimore orioles live in the Nearctic in summer, including the Canadian Prairies and eastern Montana in the northwest eastward through southern Ontario, southern Quebec and New Brunswick and south through the eastern United States to central Mississippi and Alabama and northern Georgia. They migrate to winter in the Neotropics as far north as Mexico and sometimes the southern coast of the United States, but predominantly in Central America and northern South America. Some areas of the southern United States may retain orioles all winter if they have feeders that appeal to them. The range of this bird overlaps with that of the similar Bullock's oriole in the Midwest, and the two species were once considered to be conspecific under the name northern oriole because they form fertile hybrids. The Baltimore oriole is a rare vagrant to Western Europe.

Juvenile in Maryland, United States Icterus galbula -Baltimore, Maryland, USA -juvenile-8 (1).jpg
Juvenile in Maryland, United States

Baltimore orioles are often found high up in large, leafy deciduous trees, but do not generally reside in deep forests. The species has been found in summer and migration in open woodland, forest edge, and partially wooded wetlands or stands of trees along rivers. They are very adaptable and can breed in a variety of secondary habitats. In recent times, they are often found in orchards, farmland, urban parks and suburban landscapes as long as they retain woodlots. In Mexico, they winter in flowering canopy trees, often over shade coffee plantations. [14]

From 1966 to 2015, the Baltimore oriole experienced a greater than 1.5% annual population decrease throughout the northern and eastern parts of its breeding range. [15] Among other causes Dutch elm disease destroyed a meaningful amount of their favorite nesting locations: elm trees. [16]

Behavior

Song and calls

The Baltimore orioles' song is a short set of recognizable, sweet whistles that sound like "tyew, pyeer, peededoo, and "teer." Calls include "veeer," which is an unusual nasal sound, a low chatter call, and two high calls which sound like "tyew-li and kleek." [17]

The male Baltimore oriole song is a clear whistle with a vibrant tone that flows and includes a brief sequence of notes that are paired and repeated 2-7 times, lasting 1-2 seconds. Sometimes during breeding season mature male orioles will make a "flutter-drum sound" to each other while in flight by making noise as they move their wings. Male orioles sing to proclaim and protect territory. The female Baltimore oriole also sings to communicate and while protecting her nest she gives a distinctive call which sounds like a fierce screech. Both male and female orioles make specific warning calls that sound like inharmonious chatter during combative confrontations. If there are other species of orioles in the area that hear the chatter, they will respond to alert calls and try to help defend the territory. [18]

Song of the Baltimore oriole

Breeding

Baltimore orioles are basically solitary outside their mating season. The species is generally considered monogamous, although evidence suggests that extra-pair copulation is relatively common. In the spring, males establish a territory and then display to females by singing and chattering while hopping from perch to perch in front of them. Males also give a bow display, bowing with wings lowered and tail fanned. Depending on their receptiveness, the females may ignore these displays or sing and give calls or a wing-quiver display in response. The wing-quiver display involves leaning forward, often with the tail partly fanned, and fluttering or quivering slightly lowered wings. [14]

Baltimore oriole with nest Baltimore oriole cromwell valley 6.16.20 DSC 0185.jpg
Baltimore oriole with nest

The Baltimore oriole's nest is built by the female. It is a tightly woven, bundle-like pouch located on the end of a branch, consisting of any fine plant or animal materials available, hanging down on the underside. [19] Trees such as elm, cottonwood, maple, willow, or apple are regularly selected, with the nest usually located around 7 to 9 m (23 to 30 ft) above the ground. The female lays three to seven eggs, with the norm being around four. The eggs are pale gray to bluish-white, measuring 2.3 cm × 1.6 cm (0.91 in × 0.63 in) on average. The incubation period is 12 to 14 days. Once the nestlings hatch, they are fed by regurgitation by both parents and brooded by the female for two weeks. After this, the young start to fledge, becoming largely independent shortly thereafter. If the eggs, young, or nest are destroyed, the oriole is unable to lay a replacement clutch. [14]

Mortality

Predation of adults is a common source of mortality, typically also occurring with eggs, nestlings, and fledglings. Common predators at Baltimore oriole nests can include common grackles, American crows, blue jays, black-billed magpies, tree squirrels, and domestic cats, which most commonly capture newly fledged orioles or adults engaged in brooding behavior. Rapacious birds commonly prey on both young and fully-grown orioles, the most prolific being the eastern screech owl and Cooper's and sharp-shinned hawks. Somewhat larger rapacious birds also sometimes opportunistically prey on the oriole, including peregrine falcons, great horned owls, and barn owls, while merlins may do so while orioles are migrating. [20] [21]

The oldest recorded Baltimore oriole lived to 11 years and 7 months in the wild. They have been recorded living up to 14 years in captivity. [14]

Feeding

Baltimore oriole, adult male Baltimore Oriole. Icterus galbula - Flickr - gailhampshire (2).jpg
Baltimore oriole, adult male
Adult male gaping OrioleGaping.JPG
Adult male gaping

Baltimore orioles forage in trees and shrubs, also making short flights to catch insects. [22] They acrobatically clamber, hover, and hang among foliage as they comb high branches. They mainly eat insects, berries, and nectar, and are often seen sipping at hummingbird feeders. Their favored prey is perhaps the forest tent caterpillar moth, which they typically eat in their larval stage, and can be a nuisance species if not naturally regulated by predation. The larvae caterpillar is beaten against a branch until their protective hairs are skinned off before being eaten. They will also consume beetles, grasshoppers, wasps, bugs, and spiders. [16] Baltimore orioles' consumption of forest tent caterpillars at the stage of development when they do the most damage to forest trees and plants, plays an important role in the ecosystem. [23]

Unlike American robins and many other fruit-eating birds, Baltimore orioles seem to prefer only ripe, dark-colored fruit. Orioles seek out the darkest mulberries, the reddest cherries, and the deepest-purple grapes, and will ignore green grapes and yellow cherries even if they are ripe. Baltimore orioles sometimes use their bills to "gape", stabbing their closed bill into soft fruits, then opening them to lap the juice with their tongues. During spring and fall, nectar, fruit, and other sugary foods are readily converted into fat, which supplies energy for migration. Many people now attract Baltimore orioles to their backyards with oriole feeders. Many contain essentially the same food as hummingbird feeders, but are designed for orioles, are orange instead of red, and have larger perches. Baltimore orioles are also fond of halved oranges, grape jelly, and in their winter quarters, the red arils of gumbo-limbo (Bursera simaruba). [24] If they discover a well-kept feeder, orioles lead their young there. [25]

See also

Related Research Articles

<span class="mw-page-title-main">Icterid</span> Family of birds, often black with yellow, orange, or red markings

Icterids or New World blackbirds make up a family, the Icteridae, of small to medium-sized, often colorful, New World passerine birds. The family contains 108 species and is divided into 30 genera. Most species have black as a predominant plumage color, often enlivened by yellow, orange, or red. The species in the family vary widely in size, shape, behavior, and coloration. The name, meaning "jaundiced ones" comes from the Ancient Greek ikteros via the Latin ictericus. This group includes the New World blackbirds, New World orioles, the bobolink, meadowlarks, grackles, cowbirds, oropendolas, and caciques.

<span class="mw-page-title-main">Altamira oriole</span> Species of bird

The Altamira oriole is a New World oriole. The bird is widespread in subtropical lowlands of the Mexican Gulf Coast and northern Central America, the Pacific coast and inland. They have since spread to southern Texas, but this was not until 1939.

<span class="mw-page-title-main">Bullock's oriole</span> Species of bird

Bullock's oriole is a small New World blackbird. At one time, this species and the Baltimore oriole were considered to be a single species, the northern oriole. This bird is named after William Bullock, an English amateur naturalist.

<span class="mw-page-title-main">Orchard oriole</span> Species of bird

The orchard oriole 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.

<span class="mw-page-title-main">Hooded oriole</span> Species of bird

The hooded oriole is a medium-sized New World oriole. The male of this species ranges in color from a bright orange to a paler yellow, with a black back, face, tail and bib, with the wing containing two white bars. The female is more of an olive color with some yellow accents.

<span class="mw-page-title-main">Common grackle</span> Species of bird

The common grackle is a species of large icterid bird found in large numbers through much of North America. First described in 1758 by Carl Linnaeus, the common grackle has three subspecies. Adult common grackles have a long and dark bill, pale yellow eyes, and a long tail. Adults often have an iridescent appearance on their head, especially males. Common grackles can be found widely across North America east of the Rocky Mountains.

<span class="mw-page-title-main">Yellow oriole</span> Species of bird

The yellow oriole is a passerine bird in the family Icteridae. It should not be confused with the green oriole, sometimes alternatively called the Australasian yellow oriole, which is an Old World oriole.

<span class="mw-page-title-main">Venezuelan troupial</span> Species of bird

The Venezuelan troupial is the national bird of Venezuela. It is found in Colombia, Venezuela, and the Caribbean islands of Aruba, Curaçao, Bonaire, Trinidad, and Puerto Rico. Together with the orange-backed troupial and campo troupial, it was previously part of a superspecies simply named the troupial that was split.

<span class="mw-page-title-main">Giant cowbird</span> Species of bird

The giant cowbird is a large passerine bird in the New World family Icteridae. It breeds from southern Mexico south to northern Argentina, and on Trinidad and Tobago. It may have relatively recently colonised the latter island. It is a brood parasite and lays its eggs in the nests of other birds.

<span class="mw-page-title-main">Audubon's oriole</span> Species of bird

Audubon's oriole, formerly known as the black-headed oriole, is a New World passerine inhabiting the forests and thickets of southeastern Texas and the Mexican coast. It is the only species to have a black hood and yellow body. It is divided into four subspecies and two allopatric breeding ranges. The westernmost range extends from Nayarit south to southern Oaxaca, whereas the eastern range stretches from the lower Rio Grande valley to northern Querétaro. The most common in the western range are the subspecies I. g. dickeyae and I. g. nayaritensis; I. g. graduacauda and I. g. audubonii can be found in the eastern range. Like most Central American birds, it is not a migratory species and does not display significant sexual dimorphism. DNA analysis of the ND2 and cyt-b genes strongly suggests that I. graduacauda is most closely related to I. chrysater, the yellow-backed oriole. It is a member of the genus Icterus and therefore should not be confused with the Old World orioles.

<span class="mw-page-title-main">Oriole blackbird</span> Species of bird

The oriole blackbird is a species of bird in the family Icteridae. Its genus, Gymnomystax, is monotypic. It is a medium-sized yellow and black bird found in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela, where its natural habitats are subtropical or tropical moist lowland forest, subtropical or tropical moist shrubland, subtropical or tropical seasonally wet or flooded lowland grassland, and swamps.

<span class="mw-page-title-main">Orange oriole</span> Species of bird

The orange oriole is a small bird species with orange feathers native to the Icteridae family in the Yucatán Peninsula. It has a slender body, long wings, and a pointed beak. Its color resembles the fruit orange, and it has black markings on its wings and tail. The orange oriole is known for its song and can be found in forests and gardens. They have a diverse diet that contributes to their color. According to The Cornell Lab of Ornithology Birds of the World, they have suggested that this species might be better named the “Yucatan Oriole” because they are only found in Southeast Mexico. This species is not endangered and least threatened.

<span class="mw-page-title-main">Yellow-backed oriole</span> Species of bird

The yellow-backed oriole is a species of bird in the family Icteridae.

<span class="mw-page-title-main">Saint Lucia oriole</span> Species of bird

The Saint Lucia oriole is a species of bird, in the family Icteridae and genus Icterus. It is endemic to Saint Lucia.

<span class="mw-page-title-main">Jamaican oriole</span> Species of bird

The Jamaican oriole is a species of bird in the family Icteridae.

<span class="mw-page-title-main">Spot-breasted oriole</span> Species of bird

The spot-breasted oriole is a species of bird in the family Icteridae.

<span class="mw-page-title-main">Black-cowled oriole</span> Species of bird (Icterus prosthemelas) in Central America

The black-cowled oriole is a species of bird in the family Icteridae. It is common and widespread in the Caribbean lowlands and foothills from southern Mexico to western Panama. It lives primarily in humid or semihumid forest, as well as in clearings, along forest edges, in plantations, in semi-open areas with scattered trees and bushes, and in gardens. The adult male is black, with yellow on the belly, shoulder, rump, wing lining, and crissum. The female's plumage varies depending on location. In the south of its range, it is similar to that of the male. In the north, its crown and upperparts are olive-yellow, while its face, throat, upper breast, wings, and tail are black.

<span class="mw-page-title-main">Hispaniolan oriole</span> Species of oriole endemic to Hispanola

The Hispaniolan oriole is a species of bird in the family Icteridae. It is endemic to the Caribbean island of Hispaniola.

<span class="mw-page-title-main">Cuban oriole</span> Species of songbird

The Cuban oriole is a species of songbird in the family Icteridae. It is endemic to Cuba.

<span class="mw-page-title-main">Bahama oriole</span> Species of songbird

The Bahama oriole is a species of songbird in the New World blackbird family Icteridae. It is endemic to the Bahamas, and listed as endangered by the IUCN Red List.

References

  1. ↑ BirdLife International (2018). "Icterus galbula". IUCN Red List of Threatened Species . 2018: e.T22724126A132026652. doi: 10.2305/IUCN.UK.2018-2.RLTS.T22724126A132026652.en . Retrieved 12 November 2021.
  2. ↑ Reid, Bruce (March 7, 1995). "Oriole Name Migrates to Baltimore". Baltimore Sun. Archived from the original on May 24, 2015.
  3. ↑ 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. 108.
  4. ↑ Paynter, Raymond A. Jr, ed. (1968). Check-List of Birds of the World. Vol. 14. Cambridge, Massachusetts: Museum of Comparative Zoology. pp. 160–161.
  5. ↑ Committee on Classification and Nomenclature (1931). Check-list of North American Birds (4th ed.). Lancaster, Pennsylvania: American Ornithologist's Union. p. 307.
  6. ↑ 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. 48, Plate 48.
  7. ↑ Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (December 2023). "Oropendolas, orioles, blackbirds". IOC World Bird List Version 14.1. International Ornithologists' Union. Retrieved 26 June 2024.
  8. ↑ "Oriole" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
  9. ↑ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London, United Kingdom: Christopher Helm. pp.  168, 201. ISBN   978-1-4081-2501-4.
  10. ↑ CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN   978-0-8493-4258-5.
  11. ↑ Baltimore Oriole, Life History, All About Birds – Cornell Lab of Ornithology. Allaboutbirds.org. Retrieved on 2012-08-23.
  12. ↑ ADW: Icterus galbula: INFORMATION. Animaldiversity.ummz.umich.edu. Retrieved on 2012-08-23.
  13. ↑ Baltimore Orioles, Baltimore Oriole Pictures, Baltimore Oriole Facts – National Geographic. Animals.nationalgeographic.com. Retrieved on 2012-08-23.
  14. 1 2 3 4 Rising, J., N. Flood. 1998. Baltimore Oriole: The Birds of North America , No. 384: 1–32.
  15. ↑ "Baltimore Oriole Icterus galbula BBS Trend Map, 1966 - 2015". USGS. U.S. Department of the Interior. Retrieved 2020-12-16.
  16. 1 2 "Baltimore Oriole, Icterus galbula". Audubon Bird Guide, North American Birds. 13 November 2014. Retrieved February 2, 2023.
  17. ↑ Brinkle, Edward S. (2007). Field guide to birds of North America. Sterling. p. 427. ISBN   978-1-4027-3874-6.
  18. ↑ "Baltimore Oriole Sounds, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2023-10-07.
  19. ↑ Parnell, Marc (2021). Birds of New York (The Birding Pro's Field Guides). Naturalist & Traveler Press. p. 195. ISBN   9781954228146.
  20. ↑ Bent, A. C. 1958. Life histories of North American blackbirds, orioles, tanagers, and allies. U.S. Natl. Mus. Bull. 211.
  21. ↑ Schaefer, V. H. 1976. Geographic variation in the placement and structure of oriole nests. Condor 78:1976.
  22. ↑ "Baltimore Oriole | Audubon Field Guide". Audubon. Retrieved 2024-04-20.
  23. ↑ Parry, Dylan; Spence, John; Volney, W. (1997–2002). "Responses of natural enemies to experimentally increased populations of the forest tent caterpillar, Malacosoma disstria". Ecological Entomology. 22 (1): 97–108. doi:10.1046/j.1365-2311.1997.00022.x. ISSN   0307-6946. S2CID   85944892.
  24. ↑ Foster, Mercedes S. (2007). "The potential of fruiting trees to enhance converted habitats for migrating birds in southern Mexico". Bird Conservation International. 17: 45–61. doi: 10.1017/S0959270906000554 .
  25. ↑ Harrison, G.H. (2001). "A Spring and Summer Favorite: Baltimore Oriole". Birder's World. 15 (3): 44.


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