Tuesday, April 28, 2015

Tree Swallow (Tachycineta bicolor)

It is time for a very special edition of Theo's Aviary...



We're all grown ups (or, "grups," as it were) so we can dispense with the "birds and bees" nonsense. Like any organism that reproduces sexually, birds need to find a mate with whom to fuse their reproductive cells. I photographed this lovestruck pair of Tree Swallows providing a perfect illustration of avian intimacy.

The female is positioned receptively, and the male approaches.


Most birds do not have the distinct external reproductive organs that mammals have. Instead, birds have a single posterior orifice known as a "cloaca." In males, this cloaca becomes engorged during mating season. The two individuals touch their cloaca briefly in a "cloacal kiss," like so:


The whole process only lasts a few seconds. But there's still some time for pillow-talk, apparently.



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