Traditionally, scientists have viewed such changes simply as behavior modifications in the face of a changing environment—in this case, global warming.

But scientists say these shifts provide mounting evidence that for some animals, global warming is sparking genetic changes that are altering the ecosystems we live in.

The effect is most striking in the northern latitudes, where climates are becoming more and more like those in the south, researchers say.

I thought this was interesting because we are seeing these genetic changes. Something like this is an unlikely thing to be able to study and it is good that we have this chance.

These shifts aren't simply a response to warmer summers but instead reflect recent and rapid changes to the climate at large.

It is not good that this is being caused by global warming though because overall that is dangerous and we need to find a way to prevent it.