Assertion: ostrich's leg | /r/HasProperty | upper
Facets:
Source sentences:
text: To help control their temperature they utilize the bare skin on their upper legs and flanks, covering it with their wing feathers or exposing it depending on if they want to retain heat or cool down.
text: To help control their temperature they utilize the bare skin on their upper legs and flanks, covering it with their wing feathers or exposing it depending on if they want to retain heat or cool down.