Not every helpful animal is beautiful or beloved. Some of nature’s most important workers are its scavengers — creatures like rats, crows, and beetles that feed on scraps, leftovers, and dead matter. People often find them unpleasant, but without them the world would quickly grow buried in waste. A scavenger’s job is to recycle: it eats what other animals leave behind and returns those nutrients to the soil, where new plants can use them again. Farmers, gardeners, and city cleanup crews all quietly depend on that unpaid labor.

Vultures, for example, clean away dead animals that would otherwise spread disease, while tiny beetles bury and eat waste on the forest floor. On a farm, rats do the same rough work with spilled grain, which is one reason they are so hard to drive out of a barn. Because they do this quiet work, scavengers keep whole habitats healthy. It is a useful reminder that an animal need not be pretty, or even likeable, to be valuable. The next time you see a crow picking at scraps, remember: that bird is doing a job the whole living world depends on.

No right or wrong — close the screen and tell someone nearby what happened in this part. Can’t find anyone? Tell yourself out loud. The moment you teach it, you truly understand it.