Grackle, in our front yard this morning! photo by Mary Stebbins, click on image to view larger. I love the eye.
Common grackle Quiscalus quiscula
Length: 10-12 inches
Very long tail
Frequently gathers in large flocks
Entirely black plumage
Entirely purple or purple and greenish iridiscence to plumage
Dark brown plumage
The Common Grackle is similar to blackbirds but is larger with a much longer tail. Male Great-tailed and Boat-tailed Grackles are similar but larger with longer tails.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.