Question

Which are the only mammals naturally capable of true and sustained flight?

Answer 1

@ Hello Khanamrita......@
======================

Your answer is "Bat"
This is only the mammal which is capable to true and sustained flight.

Hope it will help you!
Thanks!!
========

Answer 2

" BAT "

Bats is the only mammal which is a mammal but still can fly.

This bat comes under the kingdom Mammalia but there it can be placed as an exception.

This is an mammlia beacuse it has exoskeleton of hair, and also it is viviparous.