Blue Jay

The Blue Jay (Cyanocitta cristata) is a passerine bird, a member of the family Corvidae native to North America. It belongs to the "blue" or American jay, which are, among the Corvidae, not closely related to other jays. It is adaptable, aggressive and omnivorous, and has been colonizing new habitat for many decades. The Blue Jay measures 9-12 inches (22-30 cm) from bill to tail and weighs 2.47-3.53 ounces (70–100 g), with a wingspan of 13–17 in (34–43 cm). There is a pronounced crest on the head, a crown of feathers, which may be raised or lowered according to the bird's mood. When excited or aggressive, the crest may be fully raised. When frightened, the crest bristles outwards, brushlike. When the bird is feeding among other jays or resting, the crest is flattened to the head. Its plumage is lavender-blue to mid-blue in the crest, back, wings, and tail, and its face is white. The underside is off-white and the neck is collared with black which extends to the sides of the head.... full article at wikipedia