Chac is the Mayan god of agriculture, fertility, rain and lightning. He name is also spelt Chaac and Chaahk. He was one and many, representing the four directions; the red Chac is of the east, the black Chac is of the west, the white Chac is of the north and the yellow Chac is of the south.
Chac has a more human form where he at times appears toothless but also has a more reptilian form where he has fangs, cat like whiskers and a snout. He also wields an axe.
It is said that Chac taught how to grow vegetables and is a protector of crops. The animal associated with Chac is the frog as it is said that the sound of a croaking frog signals the coming of rain.