Question

all birds have wings and feathers but not all bird can fly give reason​

Answer 1

Answer:

a)Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. … The trigger for the migration may be local climate, local availability of food, the season of the year or for mating reasons.

b)Feathers are unique in the animal kingdom. All birds have them, but only birds have them. … Muscles are attached to the base of each feather, which allows the bird to move them as needed. When in flight, as a bird flaps its wings down, the feathers move together.

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Answer 2

Explanation:

There are many birds that can't fly. In some flightless birds, the wings have adapted to other purposes, most notably for swimming as they have with penguins. An interesting example are the Flightless Cormorants of the Galapagos…

image I have given at top

Here you can see how the wings of the Galapagos Cormorant have become all but useless; cormorants swim underwater using their powerful legs and large webbed feet.

Here you can see how the wings of the Galapagos Cormorant have become all but useless; cormorants swim underwater using their powerful legs and large webbed feet.The Galapagos Cormorant lost its ability to fly because cormorants use their flight for migration and to escape predators. In the Galapagos cormorants have a year-round abundant source of food (so no need to migrate), and flight is not effective in helping them escape the few predators they have.

Here you can see how the wings of the Galapagos Cormorant have become all but useless; cormorants swim underwater using their powerful legs and large webbed feet.The Galapagos Cormorant lost its ability to fly because cormorants use their flight for migration and to escape predators. In the Galapagos cormorants have a year-round abundant source of food (so no need to migrate), and flight is not effective in helping them escape the few predators they have.This provides a great example of how animals adapt, and how attributes that are helpful for survival are perpetuated and those not needed wither.

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