These stresses haven't necessarily doomed anything to extinction, but they're definitely changing the conditions that all of these organisms are dealing with, and that may have really important ramifications -- and anything like that has potentially big implications for humans, too.

John Bates

What I think( the model) may imply is that there are a lot of factors involved in how birds are responding, even to something like moving their nesting dates forward, we need to do a better job of understanding what factors may be important.