Air Pressure
birds and bats
Kingdom=Animalia Phylum= Chordate Class= Mammalia Order= Chiptera
Bats do, birds do not
Birds and bats
One reason why it might be unsafe for bats to roost on the ground is because of predators. It would make them more vulnerable.
Both bats and birds are warm-blooded vertebrates.
Bats are mammals, birds are not. Birds lay eggs, bats do not.
Bats have fur but birds do not. Bats are mammals that give birth to live young, whereas birds give birth by way of the laying of eggs.
Bats are not birds. Bats are flying mammals. Some birds have a rudimentary echolocation capacity. These birds are the oilbirds of South America, and the cave swiftlets of Asia.
A bat bears it's young alive, does not have feathers and does not have the high metabolic rate of a bird.
It is not only birds that fly. Bats fly and they are not birds.
They are not THAT closely related; bats are mammals, not birds. Both mammals and birds are vertebrate animals.