Swallow-tailed kite | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Accipitriformes |
Family: | Accipitridae |
Genus: | Elanoides Vieillot, 1818 |
Species: | E. forficatus |
Binomial name | |
Elanoides forficatus | |
Subspecies | |
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Distribution: Year-round Breeding Migration | |
Synonyms | |
Elanus forficatus(Linnaeus, 1758) Contents |
The swallow-tailed kite (Elanoides forficatus) is a pernine raptor which breeds from the southeastern United States to eastern Peru and northern Argentina. It is the only species in the genus Elanoides. Most North and Central American breeders winter in South America where the species is resident year round.
The swallow-tailed kite was first described as the "swallow-tail hawk" and "accipiter cauda furcata" (forked-tail hawk) by the English naturalist Mark Catesby in 1731. [2] It was given the binomial scientific name Falco forficatus by Carl Linnaeus in the 10th edition of Systema Naturae, published in 1758; [3] he changed this to Falco furcatus in the 12th edition of 1766. [4] The latter spelling was used widely during the 18th and 19th centuries, but the original spelling has precedence. The genus Elanoides was introduced by the French ornithologist Louis Pierre Vieillot in 1818. [5] [6] The name is from Ancient Greek elanos for "kite" and -oides for "resembling". [7]
The species is 50 to 68 cm (20 to 27 in) in length, with a wingspan of approximately 1.12–1.36 m (3.7–4.5 ft). Male and female individuals appear similar. The body weight is 310–600 g (11–21 oz). [8] [9] The body is a contrasting deep black and white. The flight feathers, tail, feet, bill are all black. Another characteristic is the elongated, forked tail at 27.5–37 cm (10.8–14.6 in) long, hence the name swallow-tailed. The wings are also relatively elongated, as the wing chord measures 39–45 cm (15–18 in). The tarsus is fairly short for the size of the bird at 3.3 cm (1.3 in). [10] The body is a contrasting deep black and white. The upper side of the wings is black along with the, tail, feet, and bill. The underside of the wings is partly black and partly white.
Young swallow-tailed kites are duller in color than the adults, and the tail is not as deeply forked. Sometimes a high-pitched chirp is emitted, though the birds mostly remain silent.
The swallow-tailed kite is largely associated with large tracts of wetland forests which accommodates the birds nesting habits. Loblolly pines (Pinus taeda) are the most prevalent choice for building nests but bald cypress (Taxodium distichum) are also used when the pines are unavailable. The major requirement of these nesting sites are food availability and tree height. Nesting locations are often found in trees as high as 100 ft (30 m). Historic ranges in the United States covered the majority of the Southern states and much of the Midwest (in Kentucky, Indiana, Ohio, Illinois, Missouri, Iowa, Kansas, Nebraska, and as far north as Wisconsin and Minnesota). [11] Aside from the US, it resides in many areas throughout Central and South America. Habitat degradation and changes in wetland hydrology have caused the range to shrink in the US to just coastal regions of the southeastern and southwestern US, roughly an 80% decline in population.
Swallow-tailed kites are considered migratory raptors and during the spring months often move from areas in Central and South America to breed. Roughly 3% of the world's population breed in the United States. [12] Traveling thousands of miles these birds move towards the most suitable nesting habitat found within coastal wetlands between the Americas. Satellite-telemetry has allowed researchers to track movements of individual birds over the years and has yielded data that demonstrates some migration journeys longer than 10,000 mi (16,000 km). Land located within migration routes is thought to be another concern for the kites, as deforestation and habitat degradation in Central and South Americas can have adverse affects as the birds move to breed. The birds are considered one of the most graceful fliers seen in America and often spend the majority of their lives scouring high tree tops for lizards, small mammals, and insects. The morphology of the swallow-tailed kite's wing and tail structure allows the bird to glide effortlessly for long distances. [13] [14] [12]
The swallow-tailed kite feeds on small reptiles, such as snakes and lizards. [15] It may also feed on small amphibians such as frogs; large insects, such as grasshoppers, crickets, termites, ants, wasps, dragonflies, beetles, and caterpillars; small birds and their eggs and nestlings; and small mammals including bats. [16] [17] It has also been known to prey on fish. [18] It has been observed to regularly consume fruit in Central America. [19] It drinks by skimming the surface and collecting water in its beak. The bird usually does not break flight during feeding. [8]
Mating occurs from March to May, with the female laying 2 to 4 eggs. They are white or bluish white, spotted with brown. [20] Incubation lasts 28 days, and 36 to 42 days to fledge. Often thought to form monogamous pairs, the birds are thought to spend some time apart and meet up during migrations to nesting locations. These nesting locations are often found in the highest trees in wetland areas. [8] On occasion, pairs will return to the same nesting locations of the previous years and refurbish old nests. Generally, nests take about four days to complete. [8]
Swallow-tailed kites are not listed as endangered or threatened by the federal government in the United States. They are listed as endangered by the state of South Carolina and as threatened by the state of Texas. They are listed as "rare" by the state of Georgia.
The Center for Birds of Prey in Charleston, SC has an ongoing effort to track sightings within the state. Anonymous reports can be made at Swallow-tailed Kite Sighting Form or by telephone. They will also send you the summary of the years reported sightings if you leave them your contact information.
Destruction of habitats is chiefly responsible for the decline in numbers. A key conservation area is the Lower Suwannee National Wildlife Refuge in Florida. As of 2016, populations have seemed to stabilize and even show increasing trends. Successful habitat restoration and management has allowed these birds to reestablish nesting populations in areas of Georgia, Florida, and South Carolina.
The merlin is a small species of falcon from the Northern Hemisphere, with numerous subspecies throughout North America and Eurasia. A bird of prey once known colloquially as a pigeon hawk in North America, the merlin breeds in the northern Holarctic; some migrate to subtropical and northern tropical regions in winter. Males typically have wingspans of 53–58 centimetres (21–23 in), with females being slightly larger. They are swift fliers and skilled hunters which specialize in preying on small birds in the size range of sparrows to quail. The merlin has for centuries been well regarded as a falconry bird. In recent decades merlin populations in North America have been significantly increasing, with some merlins becoming so well adapted to city life that they forgo migration.
Kite is the common name for certain birds of prey in the family Accipitridae, particularly in subfamilies Milvinae, Elaninae, and Perninae. The term is derived from Old English cȳta, possibly from the onomatopoeic Proto-Indo-European root *gū- , "screech."
The northern harrier, also known as the marsh hawk or ring-tailed hawk, is a bird of prey. It breeds throughout the northern parts of the northern hemisphere in Canada and the northernmost USA.
The yellow-billed cuckoo is a member of the cuckoo family. Common folk names for this bird in the southern United States are rain crow and storm crow. These likely refer to the bird's habit of calling on hot days, often presaging rain or thunderstorms. The genus name is from the Ancient Greek kokkuzo, which means to call like a common cuckoo, and americanus means "of America".
The red-bellied woodpecker is a medium-sized woodpecker of the family Picidae. It breeds mainly in the eastern United States, ranging as far south as Florida and as far north as Canada. Though it has a vivid orange-red crown and nape it is not to be confused with the red-headed woodpecker, a separate species of woodpecker in the same genus with an entirely red head and neck that sports a solid black back and white belly. The red-bellied earns its name from the pale reddish tint on its lower underside.
The broad-winged hawk is a medium-sized hawk of the genus Buteo. During the summer, some subspecies are distributed over eastern North America, as far west as British Columbia and Texas; they then migrate south to winter in the Neotropics from Mexico south to southern Brazil. Other subspecies are all-year residents on Caribbean islands. As in most raptors, females are slightly larger than males. Broad-winged hawks' wings are relatively short and broad with a tapered, somewhat pointed appearance. The two types of coloration are a dark morph with fewer white areas and a light morph that is more pale overall. Although the broad-winged hawk's numbers are relatively stable, populations are declining in some parts of its breeding range because of forest fragmentation.
The purple finch is a bird in the finch family, Fringillidae. It breeds in the northern United States, southern Canada, and the west coast of North America.
The eastern meadowlark is a medium-sized blackbird, very similar in appearance to sister species western meadowlark. It occurs from eastern North America to northern South America, where it is also most widespread in the east. The Chihuahuan meadowlark was formerly considered to be conspecific with the eastern meadowlark.
The summer tanager is a medium-sized American songbird. Formerly placed in the tanager family (Thraupidae), it and other members of its genus are now classified in the cardinal family (Cardinalidae). The species's plumage and vocalizations are similar to other members of the cardinal family.
An elanine kite is any of several small, lightly-built raptors with long, pointed wings.
The scissor-tailed flycatcher, known as swallow-tailed flycatcher or scissorstail, is a long-tailed insectivorous bird of the genus Tyrannus, whose members are collectively referred to as kingbirds. Its scientific name used to be Muscivora forficata until it was changed to Tyrannus forficatus. It is found in North and Central America, and is Oklahoma's State Bird.
The plumbeous kite is a bird of prey in the family Accipitridae that is resident in much of northern South America. It is migratory in the northern part of its range which extends north to Mexico. It feeds on insects which it catches either from a perch or while in flight.
The white-crowned pigeon is a fruit and seed-eating species of bird in the dove and pigeon family Columbidae. It is found primarily in the Caribbean.
The Mississippi kite is a small bird of prey in the family Accipitridae. Mississippi kites have narrow, pointed wings and are graceful in flight, often appearing to float in the air. It is common to see several circling in the same area.
The blue grosbeak, 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.
The scissor-tailed kite, also known as African swallow-tailed kite or fork-tailed kite, is a bird of prey in the family Accipitridae. It is the only species placed in the genus Chelictinia. It is widespread in the northern tropics of Africa.
The crested drongo is a passerine bird in the family Dicruridae. It is black with a bluish-green sheen, a distinctive crest on the forehead and a forked tail. There are two subspecies; D. f. forficatus is endemic to Madagascar and D. f. potior, which is larger, is found on the Comoro Islands. Its habitat is lowland forests, both dry and humid, and open savannah country. It is a common bird and the IUCN has listed it as "least concern".
The red-shouldered hawk is a medium-sized buteo. Its breeding range spans eastern North America and along the coast of California and northern to northeastern-central Mexico. It is a permanent resident throughout most of its range, though northern birds do migrate, mostly to central Mexico. The main conservation threat to the widespread species is deforestation.
Nauclerus was a genus of birds of prey, containing the African and American swallow-tailed kites. Though similar, the two species are not closely related, belonging to separate subfamilies Elaninae and Perninae.
Hawkwatching is a mainly citizen science activity where experienced volunteers count migratory raptors in an effort to survey migratory numbers. Groups of hawkwatchers often congregate along well-known migratory routes such as mountain ridges, coastlines and land bridges, where raptors ride on updrafts created by the topography. Hawkwatches are often formally or informally organized by non-profit organizations such as an Audubon chapter, state park, wildlife refuge or other important birding area. Some hawkwatches remain independent of any organizing structure.