The male boat-tailed grackle is long and weighs . The boat-tailed grackle was first described by French naturalist Louis Jean Pierre Vieillot in 1819. The boat-tailed grackle was once considered the same species as the great-tailed grackle. The eye color of the boat-tailed grackle varies with range. First described in 1758 by Carl Linnaeus, the common grackle has three subspecies. For example, the male great-tailed grackle is 60% heavier than the female. This bird is often mistaken for the common grackle but has a shorter tail. Another species (great-tailed grackle) is concentrated in one area and might also have been introduced. The male red-bellied grackle grows to about and the female about . The slender-billed grackle ("Quiscalus palustris") was a species of bird in the family Icteridae. Phillips portrayed The Turkey Representative, and Nichols portrays Indian Chief Dwight Grackle. The Slender-billed Grackle also tended to group and form flocks. The slender-billed grackle was endemic to central Mexico. The Slender-billed Grackle hatched their eggs in reeds. The Greater Antillean Grackle will eat anything that can fit in its mouth.