humming bird
Bats can do both.
Bats are mammals and give birth to live young. They reproduce sexually and the mother nurses her young after they are born, usually until they can fly and find their own food.
bucks
seagull
Bats are mammals not birds, although they share some avian characteristics. They are the only mammals that can truly fly. The "flying squirrel" and gliding possum can glide for short distances, but they don't flap their wings and fly like a bat.
A bat is a mammal and does not lay eggs but gives birth to its young ones. A bat is covered with skin and hair, not feathers. The wings of a bat are actually folds of skin stretched over elongated fingers, homologous to humans/other mammalian limbs.
Bats fly, which makes them seem similar to birds. However, they have all the characteristics of mammals. They are covered in fur, they are warm blooded, they give birth to live young, and they produce milk to feed their young.
A fly is not a mammal, reptile, or amphibian. A fly is an insect.
No they give birth on water, and allow their children to drown. If the young dragonfly is smart and strong enough, they will fly to safety...
No flies are mammals.
No, the young eagles fly all by themselves when they are ready