The bird in the photo is resting on the bison to cross the river. It's also utilizing the bison as a safety place for any alligators or other predators. Look at that bird just chilling! Now the bison is totally unaffected. He isn't being hurt or gaining something from the bird. What type of symbiotic relationship does this exemplify

commensalism

Explanation:

Commensalism is a symbiotic relationship in which one species benefits from the interaction and the other species is neither harmed nor helped. So the bird is being helped and the bison is being neither harmed nor helped.

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