Answer: Birds do not have the sex organs common to mammals. Instead, both male and female birds have what's known as a cloaca ...

As you begin to see nests full of baby chicks and fledgling birds hopping around in your backyard, you may wonder: how do ...

This fossil exhibits a cloaca—a common cavity ... a good starting point," Black said. Birds, as descendants of theropod dinosaurs, exhibit a range of mating behaviors that might mirror those ...