Tree frogs use trees for protection from the rain.

A decorator crab camouflages itself with a sea sponge. The crab is well hidden from predators, and the sea sponge gets more access to food as it travels.

A female lion stalks a gazelle. She charges and captures the prey.

In the desert, elf owls nest in abandoned woodpecker holes that can be found in giant cacti.

Oxpeckers are a type of bird that eat ticks, fleas, and lice that feed on giraffes.

The cattle egret eats insects stirred up by a buffalo walking through a field.

The tongue-eating louse attaches itself to the tongue of a fish and sucks blood. The tongue eventually falls off. The louse lives in the mouth of the fish and acts like the tongue.

Striped hyenas have been seen hunting alongside grey wolves. The wolves have excellent hunting skills, and the hyenas can break bones into smaller pieces.

Grazers are animals that eat grass. Grazers include sheep, goats, rabbits, and even grasshoppers. What type of relationship to grazers have with grass?

A fungus-filled caterpillar will "plant" itself into the ground. The fungus grows, digesting the caterpillar from the inside.

Sea sponges and coral compete for food and marine sources.

Dogs have lives alongside humans for 30,000 years. Why type of relationship do owners have with their pets?