Sectoide (X-COM)

Sectoids look like the stereotypical alien abductor - skinny, grey and with big black eyes.
Though weak, high ranking sectoids such as the Leaders and Commanders have the ability to use psionics to mentally attack and disrupt the activities of X-COM squads. Just one Sectoid with psi powers can be a deadly threat to even the toughest of squads if there are any weak links in their mental defences.

The Sectoid hierarchy ranges from soldiers to leaders with powerful psionic abilities. These psionic powers can be used to demoralise soldiers in combat, or even take control of their minds.

They tend to indulge in human abductions and cattle mutilation. The abduction is used to extract genetic material for cross breeding and developing clones for infiltrating human society. The cattle provide both nutrition and genetic material.

This race appears to want to develop superior genetic hybrids to increase the efficiency of their hive-like society