Assertion: turkey vulture's feather | /r/CapableOf | arch over the back
Facets:
Source sentences:
text: The male is able to expand a sac at the neck to display their longer feathers as a swaying skirt, with the head held proud and upward facing, the wings are pointed toward the ground and tail feathers arched over the back; they stride about an area while adopting this posture and emit deep roaring noises.