The male seahorse carries babies and 'gives birth' to them instead of the female.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
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When cats are happy, they may squeeze their eyes shut.
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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Sheep, goats, octopuses, and toads have rectangular pupils.
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