- The feathers or area beneath the end of a bird surrounding the cloacal opening.
- the region of feathers on a bird that surround its cloaca.
- That section of a bird, or the feathers, surrounding the cloacal opening; the under end coverts.
- In ornithology, the location amongst the anus while the end of a bird; specifically, the feathers of the area, the vent-feathers or under tail-coverts, collectively. See cut under bird.