Wings are there to FLY! Humans needs money to FLY! Some of them, specially from developing country may not have enough of it.
Insects have evolved to have one set of wings because it gives them an ability to fold them over their abdomens and function as a system of indirect flight muscles.
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He was sometimes described as having the wings of a bat.
Apterous
vestigial structures
No. Wings is a plural noun, or a verb form (to wing). The word "winged" can be an adjective meaning having wings.
to walk and fly
Angels are portrayed as having wings to distinguish them from humans. Most angels don't have wings though.
The hind wings of a grasshopper, which is it's second pair of wings, is used to help them fly. While the front wings are rigid, the hind wings are more membrane-like and are very colorful.
Dragonfly wings are more like butterfly wings than a robins.
to show how tough they are to attract ladies