Poison dart frogs
Some of the most colorful animals in the rainforest are also the smallest. Poison dart frogs (from the family Dendrobatidae) have bold, neon-like patterns against a black background. This serves as a warning coloration to potential predators such as snakes and spiders. Compounds from their very toxic skin are used by many tribes as an arrow poison for hunting. In the wild, Poison dart frogs hunt insects on the forest floor during the day. The Yellow and black poison dart frog (Dendrobates leucomelas) is 1.2-1.6 inches (3-4 cm) long. The Blue poison dart frog (Dendrobates azureus) is 1.2-2 inches (3-5 cm) in length.

Red-handed tamarin
Small "hairy-faced" Red-handed tamarins (Saguinus midas midas) have mottled black bodies with yellow highlighting and reddish-gold hands and feet. Like most tamarins, the main diet of the Red-handed includes insects and ripe fruit. They will also eat tree sap, nectar, small vertebrates, spiders and birds' eggs. Multiple births, usually two, are common in tamarins. The father and other members of the troop care for the young, except when the offspring are nursing. They are mostly arboreal, with the ability to leap great distances between trees or to the ground.

Emerald tree boa
Emerald tree boas (Corallus caninus) are found in the tree tops of tropical rainforests in South America. They use a "concertia mode" of tree climbing, a method often seen in arboreal snakes. Moving much like inchworms, the front part of the body moves forward while the rear portion holds position. The moving process continues as the front part holds position while the rear portion moves forward. Mammals are their main source of food. Like all boas, Emerald tree boas use constriction or suffocation instead of venom to kill their prey.

Vampire bat
Vampire bats (Desmodus rotundus) are the only mammals that feed entirely on blood. Amounts of blood equal to two-thirds of their body weight must be eaten each night in order to survive. Like most bats, they are nocturnal and use echolocation to locate their prey. They usually feed on sleeping tapirs, peccaries and birds. As their natural habitat decreases in size, cattle and swine often become easy prey. Specialized incisors slice into the skin of their prey to start the bleeding. An anticoagulant in the bat's saliva keeps the blood flowing freely. The cut is so quick and sharp that the victim seldom awakens. Large numbers of Vampire bats can be found roosting in caves, crevices or hollow trees.