Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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When dragonflies mate, their tails form a love heart.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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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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A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
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