uropygium
/ˌjʊroʊˈpɪdʒiəm/
noun
- The fleshy rear part of a bird's body where the tail feathers attach; the rump.
- The peacock fanned its tail feathers, showing off the bright area around the uropygium.
- The veterinarian examined the uropygium for signs of injury after the bird fell.
- A bird's uropygium contains the muscles that control tail movement.
Synonyms