I think that you are misunderstanding about birds having their wings removed. They call it clipping the bird's wings; but they are not actually clipping of anyting but the feathers on the wings.
Sometimes, only one side has the feathers clipped, and this makes the bird lop-sided when it tries to fly. Clipping the long feathers on a bird's wings, whether on one side , or on both sides, makes it so that the bird can't easily fly away, but usually they can still fly for a short distance.
I have done this with small birds like a parakeet, and also with larger birds such as chickens, alhough clipping the large wing feathers on a chicken is not that easy to do.
As far as de-clawing a cat, I think that is usually done to keep the cat from scratching up furniture, rather than for proection from the cat. I think that this is a sad thing to do to a cat, since it takes away their natural ability to climb and to protect themselves.
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