Gladiator tree frog

Description:

These large tree frogs may measure anywhere from 70 to 90 millimeters and are easily distinguished by a pencil thin line that runs from the tip of their snout to the middle of their back. They have extensive webbing on their hands and feet and enlarged disks on their fingers and toes.

Habitat:

Gladiator Tree Frogs are only known to exist in Costa Rica, Panama, and parts of Ecuador and Colombia. Gladiator Tree Frogs are common inhabitants of the humid lowlands in central and southwestern Costa Rica

Notes:

The third foto shows how the frog changes its color to blend in the tree. It was yellow and start changing the color some minutes after I saw it.