Piotr Naskrecki / Brown-faced Spear Bearer (Copiphora hastata), Barbilla National Park, Costa Rica

Michael & Patricia Fogden / Fringe-limbed Tree Frog (Ecnomiohyla fimbrimembra) has enlarged feet for gliding, Costa Rica

Piotr Naskrecki / Army Ant (Eciton hamatum) soldier displays its giant mandibles, soldiers will attack any enemy regardless size, Costa Rica

Piotr Naskrecki / Treehopper (Umbonia crassicornis) portrait, Costa Rica

Piotr Naskrecki / Caecilian (Gymnophis multiplicata) a small bump or chemosensory tentacle sits where the eye should be, serves as a scent organ since their nostrils are closed while burrowing underground, Costa Rica

Piotr Naskrecki / Red-eyed Tree Frog (Agalychnis callidryas) semi-transparent eyelid that allows it to see its surroundings even while resting, Costa Rica

Michael & Patricia Fogden / Slaty Flower-piercer (Diglossa plumbea) hummingbird, piercing Sleepy Hibiscus (Malvaviscus palmanus) flower, for nectar, cloud forest, Costa Rica