Maybe you were trying to avoid a Mature label, but the picture of the sprial duck genitals is eminently clip-worthy!

"I originally started with the idea of looking at the male phallus, but as soon as I looked at the first specimen and saw how extraordinary this organ was, I became intrigued at what the female would look like."

It may seem like an obvious question, but it turns out no-one else had thought to look, said Brennan.