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It's called a chicken, sounds like a chicken, tastes like a chicken and raises its young like a chicken – but it definitely isn't a chicken…
Despite its name, the mountain chicken isn't actually a chicken...
"It's not unknown for males to get stuck in the wrong position - back to front, or sideways on - or for groups to become hopelessly welded together…"
How these rain frogs get stuck in when mating
"Its teeth are serrated – like a steak knife. This lets them easily tear their prey into bitesize chunks…" 9 deadliest, sharpest teeth on the planet
When it comes to teeth there's a whole array of ways they can kill their prey
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It’s longer than a double-decker bus, weighs the same as five elephants and found in every ocean – yet hardly anyone has ever seen them…
Learn all about the little-known Bryde whale - including why they're rarely seen
They have a bizarre sex life as each beast have both male and female organs – leading to confusing orgies and extraordinary mating chains developing…
Nick Baker takes a look at the life of a sea hare
It’s tiny and virtually invisible, yet it can cause blinding pain and severe illness in humans, potentially leading to life-threatening complications
You don't want bump into one of these when swimming...
It's tiny, covered in hair, and has venomous spines potent enough to cause long-lasting, painful, effects, like muscle spasms, in humans
This is one caterpillar you shouldn't touch says Stuart Blackman
"It can carry Ebola, a nasty virus that causes bleeding from every orifice and is usually fatal." Meet the world's 7 deadliest bats, famous for carrying lethal diseases
Bats may be tiny and only come out at night but as carriers of some of the world’s most life-threatening viruses, one bite can pack a powerful punch
It sings like a whale, climbs like a cat and was once thought extinct… meet one of the world’s strangest dogs
Fox-faced and wonderfully flexible, the New Guinea singing dog or ‘singer’ is named after its extraordinary rising and falling howl, which has been likened to a yodel or even whale song
"When they started biting it was incredibly painful. In a panic, I ripped off my trousers and was standing in my underwear, screaming…"
Wildlife photographer Derek Nielsen on charming chimps, wise elephants and ants in his pants
It is one of the world's most beautiful, yet rarest big cats that's on the edge of extinction…
All you need to know about one of the world's rarest cats, the Arabian leopard
Scientists recreated the effects of dating apps on frogs. Here’s what happened next
Research from the Smithsonian Institution suggests that there is such a thing as too many options – if you’re a treefrog
These baby animals are swallowed by their fathers and ‘vomited’ out when they’re fully formed
The southern Darwin’s frog has an unusual parenting strategy that led to its starring role in a landmark Attenborough series
"It was observed mating 224 times in two hours…" Which animals have the most sex?
There are several contenders for the animals that have the most sex, says Sanjida O’Connell, from rodents to lions.
"The epithet ‘killer’ became a tabloid trope, and panic ensued…" Does the world's most dangerous, deadliest bee deserve its killer reputation?
Just how deadly are Africanised bees?
It weighs the same as 2 grizzly bears and can be aged like a tree – meet the ocean giant that hurtles through the ocean at 44 miles per hour
Bluefin tuna are impressive fish – the largest on record was a 679 kg bluefin caught off the coast of Canada in 1979. But did you know these big beasts start off at just the size of an eyelash?
"What is that?" Researchers put a camera on a nurse shark in Florida. They didn't expect it to film this
The scientists were using camera tags to learn more about shark behaviour.
15 brutal, savage snake photos showing just how lethal their killing methods can be when these deadly predators strike…
Striking images show snakes in a new light, capturing their sleek, sinuous form and predatory nature.
"It's bigger than a full-size snooker table and has a 40cm-long stinging spine."10 most fearsome, deadly river monsters, including a grisly giant leech
Freshwater holds fewer deadly surprises than the sea - rivers, lakes and streams are places of peaceful serenity. Or are they...?
"They’re built for strength and explosive bursts of speed…" Just how fast are tigers – and can a person ever run faster than a tiger?
There’s a lot to be said for not finding yourself trying to outpace a tiger.
It's the size of a Labrador and barks like a dog, yet has fangs like a snake and doesn't eat meat. Meet one of the weirdest wild animals in the world
Discover all you need to know about muntjac deer, including why it has glands on its face
It's the size of a double-decker bus and weighs a mighty 7 tonnes. Meet the ocean giant that cruises - through the oceans
Basking sharks are the second largest shark species in the world. They feed on microscopic animals called zooplankton.
"Its compelling exteriors hide a vicious secret. Its venom's so powerful it can kill a human in 5 minutes." World's 10 most beautiful lethal killers
From tigers to cassowaries, these stunning creatures prove that in nature, beauty and deadly often come hand in hand.
"Imagine a carnivorous scorpion the size of a cat with a large, deadly venomous tail…"
You wouldn't want to come across one of these in the woods
