In honor of Cousins Day, we're hanging out on a limb with these four Javan tree frogs in Indonesia. Tree frogs are smaller than your average terrestrial frogs because they spend the majority of their lives perched in trees, and their weight must be fully supported by twigs and leaves. At the rounded ends of their froggy fingers and toes are disc-shaped adhesive pads that help them to maneuver about on trees. While most tree frogs (there are 800 species all over the world!) are green, brown, or gray, these Javans are bright and colorful. This is so they can blend into their jungle environs and avoid notice by predators such as snakes, spiders, bats, and owls.