Perhaps they went to the Wizard of Oz and he gave them 'warm blood'?
This is the ridiculous nonsense that the evolutionists keep pushing on people. If necessity is the cause of all these changes then why is it that we still have examples of creatures which are identical to those of some 500 million years ago? How come that the mutations stopped for these creatures? Who told them to stop changing? Did not the environment change for all creatures or just for those which the evolutionists wanted to change?
Survival of the fittest only destroys, it is not the agency of creating anything.
Ah, the old "why are there still monkeys" argument. Your friends over at AIG asked that y'all not use that argument any more, as it is obviously fallacious.