Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Red-eyed tree frog (Agalychnis callidryas) at the Miller Park Zoo. These frogs sit completely still all day long and blend in with the surrounding leaves. They have the ability to change the green tint of their skin to make it harder for predators to see them.

ANI101-00198

Red-eyed tree frog (Agalychnis callidryas) at the Miller Park Zoo. These frogs sit completely still all day long and blend in with the surrounding leaves. They have the ability to change the green tint of their skin to make it harder for predators to see them.

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