Because they have a better chance of survival against predators think of it this way, if you are in a big group of people and someone wants to shoot one person their is a good chance that the someone wont shoot you.
some birds are to big for their wings to make them fly
birds
When birds build a nest the then lay "eggs" in it. The eggs hatch into baby birds and the adults feed these until they are big and strong enough to fly off the nest.
birds can fly it eats leaves and worms it lays eggs some birds can fly backwards,but some can't some birds are small.some are big it could fly really quick...
Cause smaller birds are scared of larger birds eatind their young so the chase and attack it for it to fly away.
Hollow, light bones. Big chest muscles.
It is not only birds that fly. Bats fly and they are not birds.
No. Although they are classed as birds, they are among the very few birds that can't actually fly at all. They are members of a group of birds called ratites. Ratites have wings but the bones in their chests do not have the capacity for flight muscles, which is what a bird needs to fly. The rhea is also a ratite.
Probably better for gliding than flying. Depends on how the birds flap their wings, how big they are and how big their wings are.
It may stand for Birds -N- Fly or Big Name Fan
I think they do. ones that could fly called the tinmous in the ratities group.
Most birds can fly. Not all.