Cloacas are one opening that deals with intestinal, reproductive, and urinary tracts. rex was one of the largest carnivorous dinosaurs, measuring 5 metres tall and weighing 7 tonnes. But for another dinosaur – a Stegosaurs cousin known as Kentrosaurus – certain body parts did get in the way.
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Of course, the male ducks haven't taken this lying down.
The more forced copulation a duck engages in, the longer the males' penises tend to be, according to a 2010 study in Proceedings of the Royal Society B.
Eagles get their cue from nature as hormonal changes occur during photoperiodism, as the days get longer after the Winter Solstice.
A full nesting chronology for bald eagles across the US can be found here. Both male and female bald eagles have a cloaca – one opening (also called the vent) that serves as the bodily exit for their digestive, urinary and reproductive systems.
We hope you enjoy this timely post about all things romantic in the world of bald eagles!