In 1896, controversy broke out when French entomologist Henri Gadeau de Kerville published the first sketch of two male cockchafers, a species of scarab beetles, copulating.
More than a century later, in 2012, researchers at the Tring Natural History Museum in the U.K. rediscovered a four-page pamphlet originally published in 1915 by the English naturalist George Levick. It seems Levick had observed same-sex sexual behaviour (SSB) in Adélie penguins.
Since then, scientists have reported SSB in pigeons, swans, albatrosses, lions, dolphins, bats, elephants, bonobos, gorillas, monkeys, lizards, tortoises, dragonflies, fruit flies, and bed bugs.
