Oxpecker birds get a good meal by eating the ticks found on a rhinocerous.
Mutualism
A bird builds his nest in a tree. The bird gets a happy home and the tree doesn't notice.
Commensalism
A cattle egret eats the bugs raised from cattle walking through a field. The bird gets a snack and the cattle doesn't care one way or another.
Commensalism
A cleaner fish cleaning the mouth of another fish. The cleaner fish gets lunch and the the other fish gets clean teeth!
Mutualism
Tapeworms infect the liver of a dog. The tapeworm gets the nutrients from the dog and the dog gets sick.
Parasitism
Yucca Flowers are pollinated by yucca moths who then lay their eggs in yucca flowers. The moths get a place to lay their eggs and the flowers get pollinated.
Mutualism
Mistletoe putting its roots into a host tree. The mistletoe grows while the host tree dies.
Parasitism
A spider uses a tree to build its web. The spider gets a home and the tree doesn't notice the spider or the web.
Commensalism
Head lice living on human scalps. The lice suck the blood and the human gets little bites.
Parasitism
A wolf hunting and eating a beaver.
Predator and Prey
Orchids growing on top of tall tropical trees. The orchid gets a home and the tree isn't harmed.
Commensalism
Bees pollinate flowers and flower are food for bees. Everyone is happy!
Mutualism
Mosquitoes feed on humans. The mosquitoes get the blood and the human gets nasty bites.
Parasitism
A tick living on a dog
Parasitism
Bedbugs in your bed. They suck your blood and you get small lesions on your legs.
Parasitism
A bear hunting and killing a deer
Predator and prey
A lion hunting and eating a gazelle.
Predator and Prey
Leeches on a person
Parasitism
A hermit crab uses the shell of another animal which has died for his new home.
Commensalism
A remora hitching a ride on a sea turtle to get its next meal. The sea turtle doesn't even notice the remora.
Commensalism