wings
so they can fly
a mom bird
When flying, the birds need power on the wing to fly. Their bodies should also be streamlined.
It is not only birds that fly. Bats fly and they are not birds.
wings are helpful.
Birds need to fly because they are the prey of many animals. They fly mostly when a carnivore is trying to eat them
So birds can fly
Birds need to consume lots and lots of food so it will have enough energy to fly. If it didn't consume enough food it would be too tired to fly
You don't need to - birds know how to fly by instinct. When they are ready to fly, they just jump up and go.
They have bigger bodies and need more power to fly.
fly to and from the island while mammals need would need a land route or be taken by boat.
Because they fly, there bones need to be hollow to cut down on there weight.