There are lizards that can literally squirt blood from their eyeballs. -Ducky935

Female butterflies have teeth in their reproductive systems. -Ceejay4444

The Cordyceps Fungus grows inside an insect’s body, infects the brain and makes it kill itself (broadly speaking). Fortunately only works on insects. -Mousse9

Dolphins are intelligent enough to commit suicide. -Ulfricstorm192

Male dolphins will kill a female Dolphin's baby in order to force her to make them a kid. Female Dolphins found the best possible way they could to counter that. Females will f**k every male dolphin they can until they give birth. Why? Well, So all these males can go "Ho shit, maybe that's my kid" and not only will they protect her from danger, but they'll also protect the kid. -Realistic-Werewolf-1

You’re more likely to be killed by a cow than a shark. -Ducky935

Kangaroos will drown you for the hell of it if given the opportunity. -Ok-Peak-3012

Female ferrets die if they do not mate once they go into heat. -Ducky935

Male giraffes will head-butt a female in the bladder until she urinates, then it tastes the pee to help it determine whether or not the female is ovulating. --eDgAR-

Horses cannot throw up. -Ceejay4444

The honeybees you see in your yard are in the last 2 to 3 weeks of their lives. -Fit-Environment-8140

House cat sex is basically BDSM. His penis has backward-bent barbs that will hurt her when he pulls out (the pain triggers ovulation). In turn she will hit him with her paws after that. -ronin668

When a Lion takes over a pride, they will kill the offspring in the pride to get rid of future rivals and send all of the lionesses into heat. -SnooChipmunks126

Lobsters brains are located in their throats. -Ducky935

Hyenas give birth through a vagina/penis and most pups don't survive. -Big-Pollution2705

Pigs will eat a human body whole, bones and all. Good for getting rid of a body. Beware of pig farmers. -DazDay

Pelicans will walk through flocks of other birds and just pick up baby chicks and eat them alive. -Big-Pollution2705

Sand Tiger Sharks eat each other while still in the womb. The momma shark has (I’m not entirely sure) at least a hundred eggs, and once they “hatch” inside her, they’ll eat each other, and usually just one or two make it out of the womb. -Chonky_railway

Tasmanian devils live in burrows. A male will break into a female's burrow and attack her. He will hold her hostage for days, biting and clawing at her refusing to let her leave her burrow until he wears her down and lets him mate with her. -c-est-magnifique

Out of sheer sexual frustration, male otters will rape baby seals if there aren’t any female otters around. -Murrnath