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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.
1 Males have a longer thicker tail than females of the same species (when they are full grown). 2  The location of the cloaca is also different between male and female turtles. 3  The cloaca is the posterior opening that serves as the vent for both the intestinal and urinary tracts of certain animal species. The female is larger and more rounded than the male. 2  In larger species, such as boas and pythons, you may see spurs on either side of the cloacal vent. 3  The spurs will be much larger on a male than on a female; in fact, many females have little or no spurs at all.