Zoolingualism

Zoolinguism is the ability to communicate with animals.

Percy Jackson and the Olympians
Percy Jackson uses this ability to communicate with various marine life and equestrian creatures numerous times throughout the series. The Hunters of Artemis can communicate with their animals as well.

The Ship of the Dead
After Magnus accidentally consumes Alderman's blood, he gains the ability to talk to animals and uses it to help him out.