The Nicaraguan grackle (''Quiscalus nicaraguensis'') is a species of

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by t ...

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

belonging to the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

Quiscalus The Bird, avian genus ''Quiscalus'' contains seven of the 11 species of grackles, gregarious passerine birds in the icterid family. They are native to North America, North and South America. The genus was named and described by French ornitholog ...

'', a genus of

grackle Grackles is the common name of any of 11 passerine birds (10 extant and one extinct) native to North and South America. They belong to various genera in the icterid family. In all the species with this name, adult males have black or mostly blac ...

s in the New World blackbird family,

Icterid Icterids () or New World blackbirds make up a family, the Icteridae (), of small to medium-sized, often colorful, New World passerine birds. Most species have black as a predominant plumage color, often enlivened by yellow, orange, or red. The ...

ae. It is found only in

Nicaragua Nicaragua (; ), officially the Republic of Nicaragua (), is the largest country in Central America, bordered by Honduras to the north, the Caribbean to the east, Costa Rica to the south, and the Pacific Ocean to the west. Managua is the cou ...

and northernmost

Costa Rica Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...

Description

It is a medium-sized bird with a long, graduated tail and fairly long

bill Bill(s) may refer to: Common meanings * Banknote, paper cash (especially in the United States) * Bill (law), a proposed law put before a legislature * Invoice, commercial document issued by a seller to a buyer * Bill, a bird or animal's beak Plac ...

and legs. The bill and legs are black and the eye is pale yellow. The male is about 31 cm long while the female is 25 cm. The adult male's

plumage Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...

is entirely black with an

iridescent Iridescence (also known as goniochromism) is the phenomenon of certain surfaces that appear to gradually change color as the angle of view or the angle of illumination changes. Examples of iridescence include soap bubbles, feathers, butterfl ...

gloss. The gloss is violet on the belly and tail, violet-green on the head, back, and breast, and blue-green on most of the wings. The tail of the male is V-shaped, rising from the centre to the outer feathers. Immature males are duller and less glossy than the adults, with a brown belly and thighs. The female is brown above with a pale

supercilium The supercilium is a plumage feature found on the heads of some bird species. It is a stripe which runs from the base of the bird's beak above its eye, finishing somewhere towards the rear of the bird's head.Dunn and Alderfer (2006), p. 10 Also ...

(the stripe over the eye), made more obvious by the dark

lore Lore may refer to: * Folklore, acquired knowledge or traditional beliefs * Oral lore or oral tradition, orally conveyed cultural knowledge and traditions Places * Loré, former French commune * Loré (East Timor), a city and subdistrict in Lau ...

s and ear coverts. The thighs, flanks, and undertail coverts are dark brown, while the rest of the underparts are buff, darkest on the upper breast, and paler on the throat and belly. The similar

great-tailed grackle The great-tailed grackle or Mexican grackle (''Quiscalus mexicanus'') is a medium-sized, highly social passerine bird native to North and South America. A member of the family Icteridae, it is one of 10 extant species of grackle and is closely ...

(''Quiscalus mexicanus'') overlaps with it in range, but is larger, with a longer tail and larger bill. The male has a less green gloss than the Nicaraguan grackle, while the female is darker below and has a less obvious supercilium. The Nicaraguan grackle has a variety of calls, including a frequent nasal call, various whistling notes, and a sharp, rising whine. The

song A song is a musical composition intended to be performed by the human voice. This is often done at distinct and fixed pitches (melodies) using patterns of sound and silence. Songs contain various forms, such as those including the repetitio ...

is a series of whistles, which increase in speed and frequency.

Distribution and habitat

It is restricted to western

and northern

. It mainly occurs in the vicinity of

Lake Nicaragua Lake Nicaragua or Cocibolca or Granada ( es, Lago de Nicaragua, , or ) is a freshwater lake in Nicaragua. Of tectonic origin and with an area of , it is the largest lake in Central America, the 19th largest lake in the world (by area) and the ...

and

Lake Managua Lake Managua ( es, Lago de Managua, ), also known as Lake Xolotlán (), is a lake in Nicaragua. At 1,042 km², it is approximately long and wide. Similarly to the name of Lake Nicaragua, its other name comes from the Nahuatl language, possi ...

, but its range has expanded a little due to the clearance of forest and creation of

pasture Pasture (from the Latin ''pastus'', past participle of ''pascere'', "to feed") is land used for grazing. Pasture lands in the narrow sense are enclosed tracts of farmland, grazed by domesticated livestock, such as horses, cattle, sheep, or swine ...

s by man. It may be a fairly recent arrival in Costa Rica, where it is found in the Caño Negro area along the Río Frio. It is not migratory, but makes some local movements in response to seasons and changes in water level. It nests only in

marshland A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found at ...

, but forages in

scrubland Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominance (ecology), dominated by shrubs, often also including grasses, Herbaceous plant, herbs, and geophytes. Shrubland may either occur naturally or ...

, wet pastures, and along lake shores and riverbanks.

Behaviour

It feeds in small groups, foraging on the ground for seeds and insects. It turns over stones or debris to look for food underneath, and often forages on or around

cattle Cattle (''Bos taurus'') are large, domesticated, cloven-hooved, herbivores. They are a prominent modern member of the subfamily Bovinae and the most widespread species of the genus ''Bos''. Adult females are referred to as cows and adult mal ...

. It nests in small

colonies In modern parlance, a colony is a territory subject to a form of foreign rule. Though dominated by the foreign colonizers, colonies remain separate from the administration of the original country of the colonizers, the '' metropolitan state'' ...

in bushes or trees or among marsh vegetation such as

sedge The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' wit ...

s. The well-hidden

nest A nest is a structure built for certain animals to hold eggs or young. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of organic materia ...

is cup-shaped and made from grass and sedge leaves and roots. Two or three

egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the a ...

s are laid; they are blue with dark markings concentrated at the larger end. Only the female incubates the eggs, but both sexes are involved in feeding the young.

References

* Garrigues, Richard & Dean, Robert (2007) ''Birds of Costa Rica'', Christopher Helm, London. * Jaramillo, Alvaro & Burke, Peter (1999) ''New World Blackbirds: the Icterids'', Christopher Helm, London. * Ridgely, Robert S. & Gwynne, John A., Jr. (1989) ''A Guide to the Birds of Panama with Costa Rica, Nicaragua, and Honduras'', Princeton University Press.

External links

Xeno-canto: recording of Nicaraguan grackle calls

Photo of Nicaraguan grackle
{{Taxonbar, from=Q1302610 Quiscalus Birds of Nicaragua Birds of Costa Rica Birds described in 1891 Taxa named by Osbert Salvin Taxa named by Frederick DuCane Godman Taxonomy articles created by Polbot