some birds are to big for their wings to make them fly
Some birds is light but some birds is heavy . That's why some can fly . I think that's the answer .
They are not defective, but some birds can't fly-for example turkeys & the ostrich.
No. Bats and some insects can fly, and neither are not considered birds.
They are different species of birds well ducks fly to sorry SOME kind of duks fly
Normally birds are easily recognizable because they have wings and fly. However, there are some birds which don't fly and some animals that do fly even though they are not birds. Birds that don't fly include ostrich, emu, cassowary and penguin. Animals that fly include bats and flying foxes.
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...
It is not only birds that fly. Bats fly and they are not birds.
All birds that soar also fly. Some birds that are very good at soaring are eagles and vultures.
Birds fly to avoid predators. Some have protective coloring.
a penguin cannot fly and others can
Birds fly to avoid predators. Some have protective coloring.