Self-grooming, using areas separate from their nest, roost or burrow as a toilet; eating only their naturally-selected diet, a lot of exercise (mainly in foraging for food).
Some birds indulge in water- or dust- baths, the latter to remove parasites.
Some animals receive symbiotic services such as the fish that will nibble away dead skin from surrounding healthy tissue, the tick-birds on large African Bush animals and the curious little eyelash-mite that lives on us and other mammals. Although these mites can cause problems of their own, depending I think on species of mite and/or host.
There is an enormous range of scavengers that help keep the habitats fairly clean too.
Grooming themselves or one another, and also exercise whether it is running on a hamster wheel, swimming or running.
The animals in the water do indeed keep the river clean. These animals include filter feeders like fish for example.
fur
Chipmunks cleanse themselves by going in a puddle or any kind of water. They actually think they are getting cleaner, but they are not. They are making themselves more dirty.
Lions are very clean animals. They keep their dens very clean and often groom themselves and each other. The females are responsible for cleaning her cubs.
Water is important to animals because animals need to drink water and also some animals live in water such as fish and need water to survive.
First and foremost we need clean water to stay healthy, to clean and flush out toxins and to generally live. Secondly, keeping water clean allows not only humans to survive but plants and animals also thrive on clean water.
First and foremost we need clean water to stay healthy, to clean and flush out toxins and to generally live. Secondly, keeping water clean allows not only humans to survive but plants and animals also thrive on clean water.
It's their way to clean themselves and keep themselves clean. It's how groom.
They lick themselves
To keep themselves clean.
It is for hygenic reasons to keep themselves clean.