Birds of New York
Zuckerberg, B., Woods, A.M. and Porter, W.F. 2009. Poleward shifts in breeding bird distributions in New York State. Global Change Biology 15: 1866-1883.
"As expected," in Zuckerberg et al.'s words, "we found all bird species (n = 129) included in this analysis showed an average northward range shift in their mean latitude of 3.58 km."
Citing a number of other studies, the three New York researchers concluded that "the repeated pattern of a predicted northward shift in bird ranges in various geographic regions of the [Northern Hemisphere] provides compelling evidence that climate change is driving range shifts." And this fact provides "compelling evidence" that Earth's birds did precisely what they should have done, over the period of Zuckerberg et al.'s study, in order to maintain a strong presence on the planet in the face of the rising temperatures (be they natural or anthropogenic) of that period.