The mistletoe lives on a spruce tree and extracts water and nutrients from the spruce to survive.

Orchids are an epiphyte, meaning they grow on tree branches in order to be higher and closer to available sunlight. They do not take any water or nutrients or other resources away from the tree.

Clown fish live among the tentacles of anemones for protection. The fish sometimes act as a lure for the sea anemone’s prey, and they also drop food particles for the anemone. The clownfish gets protection and shelter from the anemone.

As bison walk through grass, they stir up insects which are then seen and eaten by cowbirds. This bison is not affected by this action.

A flea feeds on the blood of a rabbit.

Hermit crabs make a home out of an old abandoned conch shell when their shell is no longer big enough to contain them. The conch is no longer living and is not affected by this relationship.

Ants offer protection for another small insect called an aphid, which has no protection on their own. In return, the aphids produce honeydew (a sugary liquid) for the ants to use as food.

Barnacles live attached to the sides of larger marine animals such as turtles or whales. The larger animal is not affected, but the barnacle gains access to more sources of food this way.

Rhinos (and many other

mammals) are often covered in ticks, which can irritate their skin and transmit diseases. Oxpecker birds ride on the backs of rhinos and eat the ticks as an easy meal, removing the ticks.

E. Coli is a bacteria that lives in the gut of humans. The human provides the ideal habitat for e coli reproduction and the E. Coli provides the extra vitamin K that we use.

Ostriches and gazelles feed next to each other. They both watch for predators. Because the visual abilities of the two species are different, they can each identify threats that the other animal may not see as readily.

Yucca moths lay their eggs inside the yucca flower, where their larvae hatch and eat some of the developing yucca seeds. Yucca flowers are pollinated by yucca moths.

A tick feeds off the blood of a dog. If it remains on the dog long enough, the dog can sustain severe enough injuries to not survive.

Tapeworms live inside the guts of some mammals, and get their nourishment by taking nutrients from that animal.

Remoras travel with sharks, and even attach themselves to the shark, but the shark is not bothered by this. The remora will feed on food scraps after the shark has a meal.

Honey guide birds alert and direct badgers to bee hives. The badgers then expose the hives and feed on the honey first. Once they are finished feeding, the honey guide birds eat.

The teeth of the oriental sweetlips fish

often has plaque and parasites on it that can transmit diseases and make it sick. But, good news! The wrasse fish feeds on those parasites and plaque, keeping the teeth clean.

Ants live in the acacia tree, receiving

food & shelter. In return, the ants protect the tree from leaf-eating insects, sun-stealing vines, and even large herbivores like elephants - by stinging and biting the potential threats!

A cuckoo bird lays its eggs in the warbler’s nest (along with the warbler eggs). When the cuckoo

eggs hatch, those babies kick out the warbler’s babies, and are then fed and raised by the warbler.