What does the pika say when it stops munching on cute flowers? “Eeep!” “Eeep!” “Eeep!” These calls may sound the same to us, but they sound very different to pikas. They can even recognize individual pikas by their calls. They also happen to be one of the most territorial animals, frequently involved in chases and fights — kind of like its famous cartoon counterpart, Pikachu. | Center for Biological Diversity