Animal Sex

From an evolutionary and biological perspective, animals are driven to have sex in order to procreate. But there is a lot more to sexual relations between animals. Animal sex is at least as strange and varied as human sex. A male might copulate with many females. And female animals of many species can be choosy, too. Homosexuality is common. Monogamy is rare. And the animal kingdom is full of swingers. In short, with animals, sex can be wild.
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Animal Sex: How Butterflies Do It
Two Butterflies
August 2nd, 2015
When it comes to sex, are butterflies as nurturing and gentle as they appear to be, or is there a more aggressive side to their mating?
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Spidey Senses Tingling! Arachnids Feel Sex
A Tasmanian cave spider (<em>Hickmania troglodytes</em>)
July 7th, 2015
Spider sex just got a little more interesting. Researchers now find that the spider equivalent of the penis isn't numb like once believed; it's filled with nerves that might help the spider ensure fertilization.
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Animal Sex: How Sloths Do It
A three-toed sloth in Costa Rica.
May 17th, 2015
Rather than mundane, lazy sex, sloths participate in quite the mating game. In fact, sloth sex involves high-pitched screams, promiscuity and eye-gouging battles.
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Black Widows Wreck Mates' Webs, Get Away With It
A male spider destroying a female's web.
July 17th, 2015
Black widow males destroy large sections of their mates' webs in order to ward off potential rivals.
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Animal Sex: How Antechinuses Do It
The Tasman Peninsula dusky antechinus is under threat.
June 27th, 2015
Antechinus sex involves ambushes, intermittent copulation lasting 14 hours and ultimately suicide.
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Big Butts Can Lie: Bootylicious Baboons May Not Be Most Fertile
Noodle, a female baboon from Kenya, shows off her bright-red, swollen bottom, signaling ovulation is near.
April 23rd, 2015
The swollen red bottom of a female balloon may not be the signal of sexual fitness that researchers thought it was.
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Animal Sex: How Octopuses Do It
Wild Octopus
February 2nd, 2015
Octopus mating involves shifting body colors, detachable "penises," long-distance mating and sexual cannibalism.
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Photos of the Northern Giant Mouse Lemur
Lemur in tree
July 15th, 2015
Check out these images of the northern giant mouse lemur, Mirza zaza, which has the largest testis relative to body size of any primate.
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Animal Sex: How Platypuses Do It
An Australian duck-billed platypus swims in a rainforest creek.
May 26th, 2015
With the bill and webbed toes of a duck, tail of a beaver and body of an otter, platypuses are some of the strangest-looking animals on the planet. Their mating behaviors are just as odd, involving venom battles, tail biting and aquatic dances.
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Animal Sex: How Barnacles Do It
close-up of barnacles on rock
March 3rd, 2015
In calm waters, barnacle penises are long and slender, allowing them to reach the maximum amount of partners possible. But wave-exposed, intertidal locales favor stouter penises, which are more easily controlled under turbulent conditions.
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