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 Sea Hares Do It
A spotted sea hare (Aplysia dactylomela) in Bermuda.
October 4th, 2015
Sea hare sex involves hermaphrodites, mating chains and lengthy mating events.
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Animal Sex: How Hyenas Do It
A spotted hyena mother with her cub.
August 31st, 2015
The complicated world of hyena sex involves social hierarchies, weird and potentially dangerous courtship rituals and female pseudopenises that make forced sex impossible.
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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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No Boys Allowed: Snake Mom Has 'Virgin Birth'
The yellow-bellied water snake.
September 24th, 2015
A female water snake in Missouri can do something that no human woman can (no matter how badly she might want to).
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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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#JunkOff: Why Animal Genitals Are Important to Science
weird animal penises, animal facts
September 2nd, 2015
A Twitter hashtag, #JunkOff, illustrates the steamier side of biology — and its importance to understanding evolution.
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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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