“Bats are mammals.”
What does that have to do with your question?
“If birds are better at flying than bats,...”
But we’ve already seen that their methods of flight are for different purposes and therefore not directly comparable. So you can’t say one is “better” than the other.
“why are they also better walkers than bats?”
I’m still not understanding the point of the question. How is any more sensible than asking why mice don’t have tusks?
“How is any more sensible than asking why mice don’t have tusks?”
Just wondering why when both birds and bats were given the ability to fly, the bat had his ability to walk taken away but birds didn’t.