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Genus Quiscalus
Carib Grackle - There are eight races, of which the most widespread is the nominate Q. l. lugubris of Trinidad and the South American mainland. This form was introduced to Tobago in 1905 and is now common there.
Boat-tailed grackle - The male Boat-tailed Grackle is 42 cm long. Adult males have entirely iridescent black plumage, a long dark bill, a pale yellowish or brown iris and a long keel-shaped tail. The 37 cm long adult female is shorter tailed and tawny-brown in colour apart from the darker wings and tail.
Great-tailed Grackle - Its range stretches from Kansas in the northeast to southern California in the northwest down to northwest Peru and northwest Venezuela in the south; the grackle's range has been expanding north and west in recent years. It is common in Texas and Arizona in the southern regions. It is commonly found in agricultural regions and suburban environments, feeding on fruits, seeds, and invertebrates.
Nicaraguan Grackle - It is a medium-sized bird with a long, graduated tail and fairly long bill 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 is entirely black with an iridescent 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 wing. 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 , made more obvious by the dark lores 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.
Greater antillean grackle - There are seven subspecies, each restricted to one island or island group. they differ from the nominate Hispaniola subspecies niger in size, bill size, and colour tone.
Slender-billed Grackle - The Slender-billed Grackle was endemic to central Mexico. It is recorded as having occurred in the Valley of Mexico and the Toluca Valley. Although later records indicated that it might be a marsh specialist, older observations recorded in the General History of the Things of New Spain by fray Bernardino de Sahagún indicate that it was formerly found in cultivate areas and towns. It became extinct due to habitat loss.
Common Grackle - The 32 cm long adult has a long dark bill, pale yellowish eyes and a long tail; its plumage is an iridescent black, or purple on the head. The adult female is slightly smaller and less glossy.