In America a girl with very animated eyebrows (not just straight across) is very appealing. The "arch of a raptor's wings" is meant to signify an upside-down V shape (but in real life it is not quite a V shape, that is not flattering after all, but more of an upside-down check mark, a small arch going up and smoothing down). Maybe now you can see how this is similar to the wing span of a raptor, possessing long wings, the body at the center of the bird with a short arch going up (the forearm) and arching downward at the wrist joint fanning out for awhile to make a long wing span. Just a very descriptive way of making a mental image of her attractive eyebrows. What Cherry said in her last sentence, about the metaphor, just shows how all people can read things differently and get their own meaning out of it..... like in poetry all people understand the same words differently. It can absolutely be interpreted that way, it can be interpreted in endless ways. Overall the sentence just means that her eyebrows are very attractive, we all agree on that lol.

Hello Vivian , Someone is describing a girl. He is probably so overwhelmed by her beauty, that he describes her features in detail. When mentioning her eyebrows he describes their shape as having a curved structure that resembles the shape of the wings of a raptor when flying. Raptors are birds of prey like hawks,eagles etc,,, This metaphor shows how captivating she is, that alone her eyebrows resemble the shape of a hunting bird that preys on him.

Hmmm..an usual sentence to describe a woman's eyebrows. Why do I say that? Trying to relate anything on a women to a raptor (a predatory bird of prey) doesn't seem very feminine or soft. In a way, I read the sentence as - this women has eyebrows that betray a kind of danger/strength/power. I maybe going out on a limb, but I imagine this sentence coming from a story about a ruthless, smart business women.

this means that the eyebrows of the said person have a attractive shape as the raptors wings when flying