That's depending on the bird, a regular bird you might see out your window can have from 1 to 5 or 6 babies.
The Stork and it is not fictionally haha kidding. But the animal is real
A Narwhal can have up to 2 babies at the most.
The mother bunny will take care of the babies. She will cover them with her fur if they are cold and uncover them if it is too warm. If you try to care for the baby rabbits yourself, chances are they will die. It is difficult to tell if the mother is taking care of the babies because she does not "sit" on the babies. By the time you figure the mom is not taking care of them, the babies are dead.
3
Depends.
2-5 at a time
I believe there is no bird that feeds its babies its blood. The bird and its younglings would starve to death.
no
Eagles
The bird is called a stork.
storks
Bird babies come out of eggs. Bats come out of their mommas.
None.
yes
Stork
From a heron's eggs. A heron is a bird and lays eggs. The babies hatch from the eggs.
Birds are sexual because that how they get babies