Cowbird

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Cowbird
Brown headed cowbird female in JBWR (25487).jpg
Female brown-headed cowbird
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Icteridae
Genus: Molothrus
Swainson, 1832
Type species
Fringilla pecoris [1]
Gmelin, JF, 1789
Species

Cowbirds are birds belonging to the genus Molothrus in the family Icteridae. They are of New World origin, and are obligate brood parasites, laying their eggs in the nests of other species.

Contents

The genus was introduced by English naturalist William Swainson in 1832 with the brown-headed cowbird (Molothrus ater) as the type species. [2] [3] The genus name combines the Ancient Greek mōlos, meaning "struggle" or "battle", with thrōskō, meaning "to sire" or "to impregnate". [4]

Species

The genus contains six species: [5]

ImageScientific nameCommon nameDistribution
Screaming Cowbird (Molothrus rufoaxillaris).jpg Molothrus rufoaxillaris Screaming cowbird Northeast and central Argentina, southeast Bolivia, central Brazil and throughout Paraguay and Uruguay
Giant Cowbird - Pantanal - Brazil H8O0545 (23593619780).jpg Molothrus oryzivorus (formerly in Scaphidura) Giant cowbird Southern Mexico south to northern Argentina, and on Trinidad and Tobago
Shiny cowbird (Molothrus bonariensis) male.JPG Molothrus bonariensis Shiny cowbird South America, the Caribbean, and Florida
Bronzed Cowbird (Molothrus aeneus) (7223072934).jpg Molothrus aeneus Bronzed cowbird Southern U.S. states of California, Arizona, New Mexico, Texas, and Louisiana south through Central America to Panama
Molothrus armenti Bronze-brown cowbird Colombia
Molothrus ater 2.jpg Molothrus ater Brown-headed cowbird Southern Canada, United States, and Mexico

One extinct species, the Talara cowbird (Molothrus resinosus), is known from fossil remains recovered from the Talara Tar Seeps of northwestern Peru, and likely went extinct during the late Quaternary. It may have been a close associate of Pleistocene megafauna communities, and may have gone extinct following their collapse in populations. [6]

The nonparasitic baywings were formerly placed in this genus; they are now classified as Agelaioides.

Behavior

Cowbirds are insectivores.

The birds in this genus are infamous for laying their eggs in other birds' nests. The female cowbird notes when a potential host bird lays its eggs, and when the nest is left momentarily unattended, the cowbird lays its own egg in it. The female cowbird may continue to observe this nest after laying eggs. Some bird species have evolved the ability to detect such parasitic eggs, and may reject them by pushing them out of their nests, but the female cowbird has been observed to attack and destroy the remaining eggs of such birds as a consequence, dissuading further removals. Widespread predatory behaviors in cowbirds could slow the evolution of rejection behaviors and further threaten populations of some of the greater than 100 species of regular cowbird hosts, favoring host acceptance of parasitic eggs in a mafia-like contest between cowbirds and other species. [7]

Related Research Articles

<span class="mw-page-title-main">Cuckoo</span> Family of birds

Cuckoos are birds in the Cuculidae family, the sole taxon in the order Cuculiformes. The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals, and anis. The coucals and anis are sometimes separated as distinct families, the Centropodidae and Crotophagidae, respectively. The cuckoo order Cuculiformes is one of three that make up the Otidimorphae, the other two being the turacos and the bustards. The family Cuculidae contains 150 species, which are divided into 33 genera.

<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">Western bluebird</span> Species of bird

The western bluebird is a small North American thrush.

<span class="mw-page-title-main">Mountain bluebird</span> Species of bird

The mountain bluebird is a migratory small thrush that is found in mountainous districts of western North America. It has a light underbelly and black eyes. Adult males have thin bills and are bright turquoise-blue and somewhat lighter underneath. Adult females have duller blue wings and tail, grey breast, grey crown, throat and back. In fresh fall plumage, the female's throat and breast are tinged with red-orange which is brownish near the flank, contrasting with white tail underparts. Their call is a thin 'few' while their song is a warbled high 'chur chur'. The mountain bluebird is the state bird of Idaho and Nevada. This bird is an omnivore and it can live 6 to 10 years in the wild. It eats spiders, grasshoppers, flies and other insects, and small fruits. The mountain bluebird is a relative of the eastern and western bluebirds.

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

The brown-headed cowbird is a small, obligate brood parasitic icterid native to temperate and subtropical North America. It is a permanent resident in the southern parts of its range; northern birds migrate to the southern United States and Mexico in winter, returning to their summer habitat around March or April.

<span class="mw-page-title-main">New World oriole</span> Genus of birds

New World orioles are a group of birds in the genus Icterus of the blackbird family. Unrelated to Old World orioles of the family Oriolidae, they are strikingly similar in size, diet, behavior, and strongly contrasting plumage. As a result, the two have been given the same vernacular name.

<span class="mw-page-title-main">Brood parasitism</span> Subclass of parasitism, phenomenon that an animal relies on other inidivids to raise its young.

Brood parasitism is a subclass of parasitism and phenomenon and behavioural pattern of certain animals, brood parasites, that rely on others to raise their young. The strategy appears among birds, insects and fish. The brood parasite manipulates a host, either of the same or of another species, to raise its young as if it were its own, usually using egg mimicry, with eggs that resemble the host's.

<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">Shiny cowbird</span> Species of bird

The shiny cowbird is a passerine bird in the New World family Icteridae. It breeds in most of South America except for dense forests and areas of high altitude such as mountains. Since 1900 the shiny cowbird's range has shifted northward, and it was recorded in the Caribbean islands as well as the United States, where it is found breeding in southern Florida. It is a bird associated with open habitats, including disturbed land from agriculture and deforestation.

<span class="mw-page-title-main">Bronzed cowbird</span> Species of bird in the Americas

The bronzed cowbird, once known as the red-eyed cowbird, is a small icterid.

<span class="mw-page-title-main">Vermilion flycatcher</span> Species of bird in the Americas

The vermilion flycatcher is a small passerine bird in the tyrant flycatcher family found throughout South America and southern North America. It is a striking exception among the generally drab Tyrannidae due to its vermilion-red coloration. The males have bright red crowns, chests, and underparts, with brownish wings and tails. Females lack the vivid red coloration and can be hard to identify—they may be confused for the Say's phoebe. The vermilion flycatcher's song is a pit pit pit pidddrrrreeedrr, which is variable and important in establishing a territory. Riparian habitats and semi-open environments are preferred. As aerial insectivores, they catch their prey while flying. Their several months-long molt begins in summer.

<i>Euphagus</i> Genus of birds

Euphagus is a small genus of American blackbirds. It contains two extant species: Brewer's blackbird, Euphagus cyanocephalus, and rusty blackbird E. carolinus.

<span class="mw-page-title-main">Horsfield's bronze cuckoo</span> Species of bird

Horsfield's bronze cuckoo is a small cuckoo in the family Cuculidae. Its size averages 22g and is distinguished by its green and bronze iridescent colouring on its back and incomplete brown barring from neck to tail. Horsfield's bronze cuckoo can be destiguished from other bronze cuckoos by its white eyebrow and brown eye stripe. The Horsfield's bronze cuckoo is common throughout Australia preferring the drier open woodlands away from forested areas.

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

The Martinique oriole is a species of bird in the family Icteridae. It is endemic to Martinique, French West Indies. Martinique is a part of the Lesser Antilles, and is located in the Eastern Caribbean.

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

The screaming cowbird is an obligate brood parasite belonging to the family Icteridae and is found in South America. It is also known commonly as the short billed cowbird.

<span class="mw-page-title-main">Green oropendola</span> Species of bird

The green oropendola is a species of bird in the family Icteridae. It is found in wooded habitats in the Amazon basin and Guianas of South America, and is generally common. Uniquely among the oropendolas, the green oropendola has a pale bill with an orange tip. Male oropendola weigh around 400 grams, while females are in the 200 gram range. This is a common species and the International Union for Conservation of Nature has rated its status as being of "least concern".

<span class="mw-page-title-main">Egg tossing (behavior)</span>

Egg tossing or egg destruction is a behavior observed in some species of birds where one individual removes an egg from the communal nest. This is related to infanticide, where parents kill their own or other's offspring. Egg tossing is observed in avian species, most commonly females, who are involved with cooperative breeding or brood parasitism. Among colonial non-co-nesting birds, egg-tossing is observed to be performed by an individual of the same species, and, in the case of brood parasites, this behavior is done by either the same or different species. The behavior of egg tossing offers its advantages and disadvantages to both the actor and recipient.

The convex-billed cowbird is an extinct species of bird in the family Icteridae, described in 1947 by Alden H. Miller. It is the only member of its genus, Pandanaris.

<span class="mw-page-title-main">Broodiness</span> Behavioral tendency to sit on a clutch of eggs to incubate them

Broodiness is the action or behavioral tendency to sit on a clutch of eggs to incubate them, often requiring the non-expression of many other behaviors including feeding and drinking. Being broody has been defined as "Being in a state of readiness to brood eggs that is characterized by cessation of laying and by marked changes in behavior and physiology". Broodiness is usually associated with female birds, although males of some bird species become broody and some non-avian animals also show broodiness.

References

  1. "Icteridae". aviansystematics.org. The Trust for Avian Systematics. Retrieved 2023-07-16.
  2. Swainson, William John; Richardson, J. (1831). Fauna boreali-americana, or, The zoology of the northern parts of British America. Vol. Part 2. The Birds. London: J. Murray. p. 277. The title page bears the year 1831 but the volume did not appear until 1832.
  3. Paynter, Raymond A. Jr, ed. (1968). Check-list of Birds of the World. Vol. 14. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 195.
  4. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names . London: Christopher Helm. p.  258. ISBN   978-1-4081-2501-4.
  5. Gill, F.; Donsker, D.; Rasmussen, P. (July 2020). "IOC World Bird List (v 10.2)" . Retrieved July 15, 2020.
  6. Steadman, David W.; Oswald, Jessica A. (July 2020). "New species of troupial (Icterus) and cowbird (Molothrus) from ice-age Peru". The Wilson Journal of Ornithology. 132 (1): 91–103. doi:10.1676/1559-4491-132.1.91. S2CID   220714575.
  7. Jeffrey P. Hoover; Scott K. Robinson (13 March 2007). "Retaliatory mafia behavior by a parasitic cowbird favors host acceptance of parasitic eggs". Proceedings of the National Academy of Sciences. Retrieved 26 August 2009.