IDK if I'll ever put it in a fic or anything, but the words "Eight-Legged Spider Hawk" spontaneously generated themselves in my brain as I was preparing for my evening ablutions.
My first reaction to this thought was that Peerless Cucumber absolutely
roasted Airplane in the comments when this monster made its debut, because he thought that "Eight-Legged" and "Spider" were redundant. Airplane retaliated by introducing Six-Legged and Ten-Legged Spider Hawks in the next chapter, including important distinctions between the species.
I don't know about the six- or ten-legged varieties, but here's the lore I came up with for the eight-legged ones:
Appears very much like a very large spider with hawk's wings, it is often mistaken for one in flight or while hunting. Its movement on the ground, however, is unmistakable. These creatures line their nests with a particular type of silk that makes exquisite bondage rope.
The ten- and six-legged varieties probably have somewhat different venom or are more prized for their feathers or something.