Homo sapiens: a species of mostly hairless Great Ape known for its bipedal locomotion and highly complex social dynamics, as well as sophisticated language and tool use.
While often skittish and violent when startled, these lanky creatures will adapt to new environments so quickly and completely that they seem to become blind to obvious hazards.
Proceed with caution: these apes are smart enough to be dangerous and too stupid to know when to stop.