American Blue Jay, a.k.a Cyanocitta cristata

The Blue Jay (Cyanocitta cristata) is a passerine bird, and a member of the family Corvidae native to North America. It belongs to the "blue" or American jays, which are, among the Corvidae, not closely related to other jays.
It is adaptable, aggressive and omnivorous, and has been colonizing new habitats for many decades.