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.