Common grackle bird running along logs in swamp

Bird at bird feeder, a common grackle bird (Quiscalus quiscula) eats from a swaying bird feeder.

Two boat-tailed grackles perched on a branch feeding the immature one.

What Do Grackles Eat? — Forest Wildlife

How Smart Are Grackles? — Forest Wildlife

Common Grackle Sounds, All About Birds, Cornell Lab of Ornithology

Boat-tailed Grackle Sounds, All About Birds, Cornell Lab of Ornithology

Common Grackle Identification, All About Birds, Cornell Lab of Ornithology