Slate Colored Junco is The eastern sub-species of the Dark-eyed Junco

And the ranges of birds move qiute a lot back and fourth. Probably not a result of Warming but it is possible.
We are getting a lot of Virginia Oppossum here in Central Ontario. That wouldn't have been possible when we had colder winters because of thier naked tails and hands.

Southern bird spiecies are moving north as well such as Northern Mockingbird, and Tufted Titmouse!

Raptor