gray jay

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. A bird (Perisoreus canadensis) of North American conifer forests, having gray plumage and a black-capped head. Also called camp robber, Canada jay, moosebird, whiskey jack.

from Wiktionary, Creative Commons Attribution/Share-Alike License

• n. A mostly gray bird, Perisoreus canadensis, that inhabits coniferous forests of North America.
• n. Any bird of the genus genus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. a jay of northern North America with black-capped head and no crest; noted for boldness in thievery