Greys

Greys are a supposed extraterrestrials commonly described by alleged UFO abductees in North America. Greys are short, thin, grey humanoids with large heads and large black eyes. They supposedly use disc-shaped spacecraft for transportation. They are alledged to engage in various unexplained pursuits on Earth: experimentation on random humans (often from low-income, low-education demographics), dismembering livestock for no specific reason, writing large-scale graffiti in agricultural districts, and other such innane antics.

Greys in Science Fiction

• The Asgard from Stargate
• The Vree from Babylon 5
• The Sectoids from XCOM