"You're number 1! Or are you 3?"

These quadruplets are starting school in Shenzhen, China, for the first time. So their parents decided to mark them with 1, 2, 3, 4 on their heads to make it easier for teachers and classmates to tell them apart! (Via.) 

Turtle Hair!

This is a Mary River Turtle with a nice growth of algae on its head. (By chrisvanwyksadventures.)

Alpaca!

Coolest hairdo on the planet. :)

By Tambako the Jaguar.