Grackle can refer to any of eleven (usually) black passerine

Passerine

A passerine is a bird of the order Passeriformes, which includes more than half of all bird species. Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders: with over 5,000 identified species, it has roughly...

 birds native to North and South America. All are members of the Icterid

Icterid

The Icterids are a group of small to medium-sized, often colorful passerine birds restricted to the New World. Most species have black as a predominant plumage color, often enlivened by yellow, orange or red. The family is extremely varied in size, shape, behavior and coloration...

 family but belong to multiple genera.

• Genus Quiscalus
  Quiscalus
  The avian genus Quiscalus contains six of the ten species of grackle, gregarious passerine birds in the Icterid family. They are native to North and South America...
  
  
  • Boat-tailed Grackle
    Boat-tailed Grackle
    The Boat-tailed Grackle is a passerine bird of the family Icteridae found as a permanent resident on the coasts of the southeastern USA. It is found in coastal saltwater marshes, and, in Florida, also on inland waters. The nest is a well-concealed cup in trees or shrubs near water; three to five...
    
    , Quiscalus major
  • Common Grackle
    Common Grackle
    The Common Grackle, Quiscalus quiscula, is a large icterid.-Description:The long adult has a long dark bill, pale yellowish eyes and a long tail; its feathers appear black with purple, green or blue iridescence on the head, and primarily bronze shine in the body plumage...
    
    , Quiscalus quiscula
  • Great-tailed Grackle
    Great-tailed Grackle
    The Great-tailed Grackle is a medium-sized, gregarious passerine bird native to North and South America. A member of the Icteridae family, it is of the ten extant species of grackle and is closely related to the Red-bellied Grackle and the Velvet-fronted Grackle...
    
    , Quiscalus mexicanus
  • Slender-billed Grackle
    Slender-billed Grackle
    The Slender-billed Grackle was a species of bird in the icterid family Icteridae. The species was closely related to the western clade of the Great-tailed Grackle, from which it diverged around 1.2 million years ago....
    
    , Quiscalus palustris - extinct (1910)
  • Nicaraguan Grackle
    Nicaraguan Grackle
    The Nicaraguan Grackle is a species of passerine bird belonging to the genus Quiscalus, a genus of grackles in the New World blackbird family, Icteridae. It is found only in Nicaragua and northernmost Costa Rica....
    
    , Quiscalus nicaraguensis
  • Greater Antillean Grackle
    Greater Antillean Grackle
    The Greater Antillean Grackle is a grackle found throughout the Greater Antilles and the Cayman Islands as well as smaller, nearby islands. Like all Quiscalus grackles, it is a rather large, gregarious bird...
    
    , Quiscalus niger
  • Carib Grackle
    Carib Grackle
    The Carib Grackle, Quiscalus lugubris, is a New World tropical blackbird, a resident breeder in the Lesser Antilles and northern South America east of the Andes, from Colombia east to Venezuela and northeastern Brazil....
    
    , Quiscalus lugubris
• Genus Hypopyrrhus
  • Red-bellied Grackle
    Red-bellied Grackle
    The Red-bellied Grackle is a species of bird in the Icteridae family. Its genus, Hypopyrrhus, is monotypic. It is endemic to Colombia. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.-References:* BirdLife International 2004. . Downloaded on...
    
    , Hypopyrrhus pyrohypogaster
• Genus Lampropsar
  • Velvet-fronted Grackle
    Velvet-fronted Grackle
    The Velvet-fronted Grackle is a species of bird in the Icteridae family. It is monotypic within the genus Lampropsar. It is found in Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Venezuela. Its natural habitats are subtropical or tropical swamps and heavily degraded former forest.-...
    
    , Lampropsar tanagrinus
• Genus Macroagelaius
  Macroagelaius
  Macroagelaius is a genus of bird in the Icteridae family.It contains the following species:* Golden-tufted Grackle * Mountain Grackle...
  
  
  • Golden-tufted Grackle
    Golden-tufted Grackle
    The Golden-tufted Mountain Grackle , also known as the Golden-tufted Grackle, is a species of bird in the Icteridae family. It is found in Brazil, Guyana, and Venezuela. Its natural habitat is subtropical or tropical moist montane forests.-References:* BirdLife International 2004. . ...
    
    , Macroagelaius imthurni
  • Mountain Grackle
    Mountain Grackle
    The Colombian Mountain Grackle , also known as the Mountain Grackle, is a species of bird in the Icteridae family.-Distribution and habitat:...
    
    , Macroagelaius subalaris

Some members of the starling family have historically been called as grackles. Tristram's Starling, Onychognathus tristramiiis, is sometimes known as "Tristram's Grackle" and the hill mynas in the genus Gracula

Gracula

Gracula is a genus of mynas, tropical members of the starling family of birds. Until recently only two species were recognised, G. religiosa and G. ptilogenys; earlier still all Gracula were considered to belong to a very variable species commonly called Hill Myna. But three additional subspecies...

have also been called as grackles, but these are members of the starling

Starling

Starlings are small to medium-sized passerine birds in the family Sturnidae. The name "Sturnidae" comes from the Latin word for starling, sturnus. Many Asian species, particularly the larger ones, are called mynas, and many African species are known as glossy starlings because of their iridescent...

family.