I remember having an epiphany about frogs back in 1997. I was walking along the shore of the Mad River up near Arcata. I'd put my foot down and half a dozen frogs that had been invisible about the size of quarters would scurry away from the general area and disappear again. I'd put my other foot down and the process would repeat, mostly with completely different frogs that were just as invisible. Then I realized that those frogs were perfectly evolved to be invisible sunning themselves on those rocks. I'm thinking that the reason climate change is threatening frogs is that their niches are moving faster than they can change to adapt to the new niches.