Aliens are shrimpies that come outer space. They are usually green but there are other variations.
The Aliens come when you are least expecting it, usually late at night in a forest, far away from any town where they'll be spotted, so they can strike. They will abduct you and examine you for scientific reasons.
These are the species.
The very basic green kind. They appear in spaceships.
Men In BlackEdit
Men in Black appear after an abduction or sighting to hush it up. They are usually friendly, however.
Reptilians are Shape-Shifters and are like marine iguanas. They are evil, and cannot be befriended.
Robots have lasers to fire at your when they need to. Don't make them angry, then!