Flies take the first place in the ranking of the world's dirtiest animals due to their consumption of human and animal feces, carrying dense bacteria and pathogens.

Fly

Vultures cool themselves by pooping on their own feet since they lack sweat glands, and the water in the waste evaporates, helping them remove heat.

Vulture

This slime eel secretes nearly 8 liters of mucus when in danger, which protects their body and deters enemies from touching them.

Hagfish

Sea cucumbers, resembling big sausages, consume the feces and bodies of dead animals and are also a popular dish among humans.

Sea cucumber

Baby koalas cannot directly eat eucalyptus leaves, so they consume them through their mother's feces after weaning.

Koala

Female tahrs mark their sovereignty by urinating on males during the mating season, displaying a peculiar behavior.

Himalayan tahr

Red wolves have the habit of consuming decaying fish or prey, even if they have been dead for many days.

Red wolf

Hippopotamuses bathe in their own mixture of feces and urine, and can create a rain of poop as a territorial marking or mating signal.

Hippo

Cows emit large amounts of methane gas through farting, contributing to environmental pollution.

Cow

Giraffes have a long neck, a 45cm long tongue, and can use their tongues for both feeding and ear picking.

Giraffe