“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.
Well, I’m not the one who designed them, so I can only speculate. If I had to guess, I would say it probably has something to do with the fact that most birds need to walk in order to feed themselves, while most bats do not.
And I'm wondering why - when both fish and monkeys were given the ability to swim - the fish had his ability to climb trees taken away, but monkeys didn't.
And why - when both seaturtles and ducks were given the ability to lay eggs - the seaturtle had his ability to fly taken away, but the duck didn't.
And why - when...
Hint: No abilities were "given" or "taken away" - they developed - in response to differing environmental pressures, and from different starting points - in different ways.
Regards,