I really mean I feel silly, but i really hate to tell ya, hybrids occur, no one said commonly, where the heck did you get that? But they still occur. As I said, more commonly then you may think. But most would fail right off, for lots of goofy reasones, you know, like the stuff you have been saying. The only requirement is crossing eachothers path. Yes, there are mechanisms to prevent this, but as you will learn in life, all things fall, sooner or later.
I know I have an advantage of being an old frog, and having the advantage of hanging with keepers and zoo fellas my whole life. so I have seen them every now and again. But not commonly.
How come no one would guess on my pic, are your afraid to be wrong????? F