Enderman

An Enderman (plural Endermen) is a three-block-high, humanoid, neutral mob. Endermen are known for their unique ability to teleport and pick up blocks.
Along with those abilities, they also have a peculiar way of becoming provoked; as well as becoming provoked when attacked, Endermen will also become hostile when a player looks at their upper legs, torso, or head.
Endermen frequently spawn in The End, their home world, but they still require a light level of seven or less in order to spawn. They will also spawn in the Overworld, although about 10 times more rarely in comparison to other mobs. They can be seen regularly at night in groups of up to five.

Teleportation

When teleporting, an Enderman will leave a faint trail of particles similar to those of a nether portal leading to itself from where it teleported, but, if an Enderman is holding a block it will not leave a trail. Endermen teleport when coming in contact with rain or water - though not if set on fire. Endermen can step up one full block without having to jump. The range in which an Enderman can teleport is 32 meters in most cases, however informal testing on superflat worlds shows they can travel much further on the Y axis. An Enderman can teleport onto any solid block, the only exceptions being blocks directly beneath water or lava.
An Enderman cannot teleport when it is in a minecart. However, if it is hit with a projectile, it will teleport out of the minecart and then immediately teleport back. It is nearly impossible to hit it with a projectile, even glitched.