Granular Poison Frog, Oophaga granulifera

The Granular Poison Frog (Oophaga granulifera) is a species of frog belonging to the family Dendrobatidae, found in Costa Rica and Panama. Its natural habitats are tropical and subtropical, moist, lowland forests, but it’s threatened by habitat loss. This frog has been switched from Dendrobates granuliferus to Oophaga granulifera.

The frog is an aposematic animal, and it utilizes poison only for the purpose of self defense from predators. It’s clearly visible red color is designed as a warning signal to all potential predators. Experimental studies in Costa Rica suggest that the male granular poison frog spends most of its time and energy defending its calling site. The data from these studies also show that these warning signals are more vocal than visual. If an encroaching male granular poison frog were to dare approach too closely, these frogs have no worries about engaging in physical activity.

Image Caption: Granulated poison arrow frog. Credit: Patrick Gijsbers/Wikipedia (CC BY-SA 3.0)