If evolution is true, where did flying creatures come from?

Your opening sentence is one of the most ironic things ever said at this site. You are asking easily answered questions, simply because you haven't bothered to think about it, or even performed the most basic search for information.There are any number of resources that you can turn to that will show you the answers that science currently provides to those questions. If you really want to know, we'd be happy to direct you there. However, I'm quite certain you don't want to know the answers. I'm quite sure that you consider these to be deep questions, unanswerable by science. And, the fact that you think these questions are unanswerable makes you feel more secure in your faith in some deity or other, most likely the Christian god.Be careful where you tread here. If you look too closely, you will find there are many, many answers to questions that will make you quite uncomfortable. Or you will learn to ignore the answers that make you uncomfortable and whistle past the graveyard.

I see that both Cat Sci and Tangled have provided information for you. Is that sufficient to answer your questions?

I not only think about what creationists say, I've read many, many of their writings. Given the level of understanding that the typical creationist has about evolution, I'm quite confident that I've read a LOT more creationist product than they have read science.

I hope you'll forgive me if I doubt the sincerity of this. The fact that you could even ask the questions you asked at the beginning of this thread demonstrates quite clearly that you have read very little, if any, about the Theory of Evolution. If in fact you are saddened by the things you claim, I'd suggest the best first step for you to take would be to follow your own advice and read something about the Theory of Evolution before you start taking badly aimed potshots at it.