Animal homosexual behaviour under-reported by scientists, survey shows

Study finds same-sex sexual behaviour in primates and other mammals widely observed but seldom published

George Murray Levick, an explorer with the Scott Antarctic expedition, spent the summer of 1911-12 taking detailed notes on the breeding cycle of Adelie penguins. Male penguins, he was surprised to discover, frequently had sex with other males, but this fact was deemed too shocking for inclusion in the official expedition report and it was another 50 years before it was noted in the scientific literature.

Today, same-sex sexual behaviours have been reported in a wide variety of species, but a new analysis suggests a gulf remains between how often it happens and how often we hear about it. A survey of animal scientists found they widely observe, yet seldom publish about, same-sex sexual behaviour in primates and other mammals.