Common and Boat-tailed Grackle

Common Grackle
Female Boat-tailed Grackle

In North America three grackle species occur: Common, Great-tailed, and Boat-tailed. All are generally similar in appearance, with males glossy iridescent black and females brownish. 

Common Grackle is smaller than the other two grackle species, with a shorter tail and smaller bill. Males and females are more similar in this species; females generally lack the strong iridescence shown by males, but do not have the buffy brown underparts of Great-tailed/Boat-tailed.

Female Boat-tailed Grackles are dark brown above and russet below, with a subtle face pattern made up of a pale eyebrow, dark cheek, and pale “mustache” stripe.