Claim: Animals that already live in the warmest places may be "particularly vulnerable" to slightly higher temperatures

Rainforest species particularly vulnerable to global warming

But from the article above, we learn that warmth isn't all bad:

The bulk of global biodiversity is found in tropical forests.

And a comforting scoop from a related article:

Concern over global warming has largely focused on arctic species like the polar bear. But such animals may be accustomed to living in a wide range of temperatures, while there tends to be little change in the tropics, so there has been no need for species there to adapt.