Vireo Altricapilla.

It is 4.5 inches long

There are fifteen types of vireos in North America, nine of these vireos live or have been identified in Canada. These are the Bell's Vireo, Blue-headed Vireo, Cassin's Vireo, Hutton's Vireo, Philadelphia Vireo, Red-eyed Vireo, Warblering Vireo, White-eyed Vireo, and the Yellow-throated Vireo. The rest range mostly in the Southern States into Mexico. They are the Black-capped Vireo, Black-whiskered Vireo, Gray Vireo, Plumbeous Vireo, Thick-billed Vireo and the Yellow-green Vireo.

The Massachusetts state bird is a black- capped chickadee.

Black-capped chickadees are non-migratory.