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Yes, some don't because their wings are not necessary or have been modified for a different purpose. Flightless cormorants in the Galapagos Islands have lost the ability to fly because for many generations they have not had any predators, and thus those without the ability to fly were not weeded out by predators. Penguins also cannot fly because they are specially adapted for swimming; the price of efficient swimming is the loss of flight. Similar to the flightless cormorants, penguins have few predators and seek out places of refuge away from most predators. Also large birds such as the ostrich are too heavy to fly and instead rely on their ability to run quickly to avoid danger.
What else can I help you with?
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
Do birds eat fly's?
no they dont amla
What does Let The Birds Fly mean?
it means dont try to change someone. let the birds be birds and do what birds do...
Why can some birds fly and some cant?
some birds are to big for their wings to make them fly
Who wrote some birds can't fly?
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 ;)
What is highest bird jump?
birds dont jump, they fly
Which bird can fly?
All birds that are light and have feathers and have a purpose to fly
Why some bird can fly some can't?
Some birds is light but some birds is heavy . That's why some can fly . I think that's the answer .
Are there some defective birds who can't fly?
They are not defective, but some birds can't fly-for example turkeys & the ostrich.
Are birds the only animals that can fly?
No. Bats and some insects can fly, and neither are not considered birds.
Are penguins birds?
Yes, they are. Penguins are birds but they can not fly. However they still have feathers, are warm blooded and lay eggs.
Why can birds fly and ducks swim?
They are different species of birds well ducks fly to sorry SOME kind of duks fly
