The Boat-tailed Grackle is a coastal bird with striking differences between the sexes. Males are blue-black with extremely long tails, while females are much smaller and dark brown.
Males are glossy blue-black with exceptionally long tails. Females are rich dark brown and about half the male's size.
It walks along coastal marshes and shallow water, searching mud, litter, and low vegetation for food. It eats shellfish and snails, and has been observed opening shells with its bill.
An extinction-risk assessment has not been added yet.