Koalas have a highly specialized diet of eucalyptus leaves, which are tough to digest. Their digestive system breaks down these leaves efficiently, producing minimal waste.

Sloths have a slow metabolic rate and a diet that consists mainly of leaves. Their digestion is slow, and they only defecate about once a week.

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Insects like mosquitoes and ticks feed on blood, and their waste is usually reabsorbed as they extract nutrients from their blood meals.

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Birds of Prey

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Hagfish

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Jellyfish

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Tapeworms

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Koalas have a highly specialized diet of eucalyptus leaves, which are tough to digest. Their digestive system breaks down these leaves efficiently, producing minimal waste.

Koalas

Sloths have a slow metabolic rate and a diet that consists mainly of leaves. Their digestion is slow, and they only defecate about once a week.

Sloths

Insects like mosquitoes and ticks feed on blood, and their waste is usually reabsorbed as they extract nutrients from their blood meals.

Blood-Feeding Insects

Birds of Prey

Birds like eagles and owls regurgitate indigestible parts such as bones and fur as pellets. These pellets are not feces but rather compact masses of undigested material.

Hagfish

Hagfish are marine creatures that consume dead and decaying organisms. They have a unique slime-producing gland that helps them get rid of waste material.

Jellyfish

Jellyfish have a simple digestive system with only one opening, through which they both consume food and expel waste. Their waste is released as a mucus-like substance.

Tapeworms

Parasitic tapeworms live inside the digestive tracts of other animals. They absorb nutrients directly through their skin, leaving little waste behind.