Pequeninos

The Pequeninos (Portuguese for "little ones"), or piggies, are a fictional alien species in the Ender's Game series by Orson Scott Card. They are first introduced in the book Speaker for the Dead. The Pequeninos are written as forest-dwelling and technologically primitive, but incredibly intelligent, able to learn languages extremely quickly. They were given the nickname "piggy" by the colonists of the planet Lusitania due to their pig-like appearance.