Not a Seed-Eater

A young hawk in Arlington, Virginia. One birder in the neighborhood thinks it’s a Sharp-shinned Hawk but since all young hawks have nearly identical coloration and patterns, it could also be a Cooper's Hawk. Both are of the family Accipiter (bird hawk), named for their preferred food, and aren't uncommon in area backyards - especially those frequented by smaller, seed-eating birds.

In fact, a Cooper's Hawk recently found her way into the Library of Congress and spent a week flying around inside the domed ceiling in the Main Reading Room. Thankfully, the hawk (now known as Jefferson) has finally been contained and will return to her natural habitat soon. More on Jefferson here.
(Post by DW)