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i dont know who wrote that but not all birds can fly, for example the ostrich. Some non-birds can fly, like bats and other rodents (flying squirrel, which glides more than anything really). The main answer is, creatures who can fly must have the capacity in their wing span...HOPE THAT HEPLED ;)
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∙ 15y ago
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Why can some birds fly and some cant?
some birds are to big for their wings to make them fly
Birds that cannnot fly?
penguins cant fly, and chickens cant propperly fly!
What birds have 7 letters and cant fly?
Penguin
What can hummingbirds do that most other birds cant?
Fly backwards
What are the differences between birds that can fly and birds that can?
well, a bird that cant fly has a larger body mass than one that can
What birds can't walk?
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
Can birds fly with oil on there wings?
no they cant fly because it weighs down their wings
Can pigeons fly backward?
Yes they do. Nearly all birds can walk. (Some birds that spend a lot of time on water find it difficult. Some, like Swifts, stay in the air.)
Is a hen a brid?
yes, chickens are birds even if they cant fly
What do this birds have in common the emu the penguuin the kiwi and the ostrich?
They cant fly...
Why birds can't fly at night?
they cant fly at night because their eye sight is only for day
What can hummingbirds do that most birds cant?
Hummingbirds can fly backwards.Hover.
