Today’s word of the day is falx, something that is sickle-shaped, such as the poison fangs of a serpent, a metal implement (similar to a pruning hook), or, in anatomy, something which is falcate or falciform, both which mean “sickle-shaped” or “hooked.” Because of the bird’s sharp, hooked talons, falcon probably comes from the same root as falx.

Gerfalcon
“Because of the bird’s sharp, hooked talons, falcon probably comes from the same root as falx.”
I don´t think so. Falcon comes from the same root as falx, because of the sickle-shaped silhouette of them in the sky, resulting from the long, tapered wings.