Because:
1. They evolved that way
2. Some birds have no need for flight
3. Bees have wings
some birds are to big for their wings to make them fly
penguins cant fly, and chickens cant propperly fly!
Yes, bees can fly in the rain for a limited time, but they try to avoid it.
Insects that have wings can fly. They fly with their wings like birds.
Penguin
Fly backwards
well, a bird that cant fly has a larger body mass than one that can
yes i think flies,midgets bees,wasps & lady-birds are invertebrates that can fly
birds can walk .. how do they start get ready to fly ? you dont see birds flying when its night time ? but some birds live on branches , but i dont think some birds cant walk .. i donno .. -MimiRules
no they cant fly because it weighs down their wings
Butterflies, bees, and birds are common creatures that are active and fly in the daytime.
Lots of birds can fly, birds such as eagles, vultures, cardinals, blue birds, magpies, flamingos, toucans, geese, ducks, parrots, crows, etc. There are only a few birds that cannot fly, such as the ostrich, kiwi and penguin. Some insects such as butterflies, beetles and wasps can fly. The only mammal that can fly are bats. Flying squirrels only glide and flying fish only jump very high.