The spines on a Tiger's tongue are sharp enough to lick skin clean off of muscle.

Female dragonflies will fake being dead in order to stop unwanted male advances.

When caterpillars enter the chrysalis phase, they don’t just sprout wings, their entire body first turns into a liquid, soupy substance which then reforms into the butterfly.

Crows recognize individual people even if they are wearing disguises and after many years. (The people are wearing disguises, not the crows.)

Sloths are literally too lazy to go looking for a mate, so a female sloth will often sit in a tree and scream until a male hears her and decides to mate with her

Tarantulas have pet frogs. The frogs eat bugs and parasites that would damage the spider’s eggs, and in turn the spider protects the frog. Even after the eggs hatch they continue to protect the frog.

All the deep sea anglerfish you see pictures of with the lil lights hanging over their heads? They're all female. The males are tiny and born with a terribly weak jaw and a massive hunger. They seek out a female, and torn between hungry and horny they bite her. She then releases an enzyme that fuses the male to her body. She slowly absorbs them into her body with only their lil testicles remaining so she can instantly fertilize her eggs when she wants to. Some females have rows and rows of lil testicles on their bodies from where they have absorbed multiple males. And you thought your sex life was weird, eh? But no kink shaming.

Roosters deafen themselves temporarily every time they crow, so that they don’t damage their own hearing.

Penguins have a gland above their eye that converts saltwater into freshwater

Snakes don't have eyelids. If you see a snake blink, that's a legless lizard.

The chemical compound which is used to make fake banana flavour is the same compound honey bees use as an alarm pheromone. So never eat banana sweets near a beehive, and if you suddenly smell banana near a beehive, run!

Vultures urinate on their legs and feet to cool off on hot days, a process called urohydrosis. Their urine also helps kill any bacteria or parasites they’ve picked up from walking through carcasses or perching on dead animals.

Bees have 5 eyes. 2 complex like a fly's and 3 simple eyes like a spider.

A beaver's a*s smells like icecream. Castoreum, the product of those anal glands, was once used as a flavor substitute for vanilla. It’s now only used in perfume and a style of Swedish schnapps called Bäverhojt, or “beaver shout.”

Turtles can breathe through their butts

The binturong, also known as the bearcat, is an arboreal mammal closely related to the red panda. It smells like popcorn! My obscure fact about it is that captive binturong are capable of holding grudges, and will climb above people they dislike in order to s**t on their heads.

Woodpecker tongues wrap around the back of their brains. This helps the brain stay protected during high speed pecking.

Many bird species will eat the fecal sacks of their young, thus keeping the nest clean for their young. I no longer wish I knew what it would be like to be a bird.

We all know an octopus has 8 legs. It also has 3 hearts and 9 brains, and it can fit itself through a hole the size of a quarter.

All halibut are male until they reach 45 inches in length. They then all become female.

Chickens will come say goodbye to each other when one is dying and they do soft clicks and will then leave and that chicken will normally die alone. Some chickens also will kill another chicken because they sense something’s wrong with the chicken, a disease for example. Hope u enjoyed these facts I found them in a book called How To Speak Chicken.

Pacu fish have teeth that look exactly like people’s. They evolved to chew nuts that fell into the water.

Rabbits don't have pads on their paws. Only fur. So if you see a cartoon rabbit with pads on it's paw, completely wrong.

A kangaroo will mate again one to three days after giving birth. the newborn will latch onto a teat in the pouch and as long as it thrives, the kangaroo can put its newly fertilized embryo in a state of dormancy and have a back up baby ready to go. if the newborn grows out of the pouch or dies, the kangaroos hormones will send signals to start the development of the egg. so they can have an adolescent Joey, a nursing one, and one in stasis all at the same time.

Hippos sweat is red.

Platypus' glow teal under a UV light, so Perry the Platypus is actually the correct color.

Sea cucumbers spit out their insides to scare away predators.

The Inland Taipan (snake) has the strongest/potent venom on the planet, capable of killing around 290 humans with a single bite. Scaled to mice, a single bite could kill 250,000 mice. That said, bites from the Inland Taipan to humans have been ***pretty rare*** as they usually stay underground and are not overly aggressive unless you jump all over their burrow. They also have a good number of predators who prey on them.

Baby Koalas nuzzles their mother's butt to releases a runnier, protein-rich substance, called pap which they then drink to get mom's gut bacteria, helpful in digesting eucalyptus leaves.

The bearded vulture or bone-eating vulture, is a rare eur-asian vulture that only eats marrow, that looks rusty in color but is in fact white. This rusty color is because they actually paint themselves with red clay deposits to look attractive to their mates. They are really cool looking. They have a little tuft of feathers below their beaks that looks like the beard of a dragon, so that is why they are called that. Other cool fact: They can dissolve bone in the acid of their stomach in 24 hours. The PH of their stomachs is 1 which is VERY acidic. They are the only vulture species in the world that 90% of its diet is just bone.

The vast majority of Greenland sharks are blind thanks to a special parasite that eats their eyes and replaces them. It is thought that this might actually be helpful because a) their eyesight was s**t anyway, b) the parasites wave like lures and may have an anglerfish-like effect, and c) the sharks are super slow so that might be one of the few ways for them to catch live prey. Imagine something eating your eyeballs and it being an *upgrade*.