Perhaps God was just having fun with parallel dimensions and popped a couple of humans and a few other things, like elephants, into one of his old worlds that still had a bunch of old bones laying about from when he was fiddlin around with stuff before, that didn't quite work out right, but some of the old bones like komodo dragons in China weren't dead yet, but God forgot about that and he liked that dinosaurs had become birds, instead of large vicious beasts and fat grazers and so he left the birds around for the ones from the parallel dimension to look at.