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(noun) The cloaca is the single posterior opening for a bird's digestive, urinary and reproductive tracts and is used to expel feces and lay eggs. The cloaca is found on the rear of the body under the base of the tail, covered by feathers on the extreme lower abdomen.
Male and female birds typically have a cloaca, or vent, which is an opening to their reproductive, digestive, and urinary systems. â National Geographic, Watch the Awkward Balancing Act of Seagull Mating, 1 June 2017. The maleâs penis emerges from his cloaca, going under the femaleâs shell and into hers.