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Fossil turtle pairs provide first direct evidence of prehistoric vertebrate mating. The moment of orgasm has sometimes been called the “little death”, but several pairs of prehistoric turtles may have died before they reached that moment. Palaeontologists have discovered fossilized turtles in flagrante delicto. 
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Courtship rituals can be all-consuming, demanding time and effort – but now scientists have discovered why it might be worth it.
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Maria Albo, Gudrun Winther, Cristina Tuni, Søren Toft and Trine Bilde at Aarhus University in Denmark set out to see if the quality of the gift would affect whether or not a female mates, and if she does mate, how long she mates for. The research team went outside and collected a bunch of juvenile nursery web spiders, and then raised them up on a housefly diet until adulthood (This way the researchers knew that all the spiders were virgins, which is important). Then they offered males items to wrap: a normal housefly, a protein-enriched housefly, a worthless gift (a cotton ball, dry flower head or leftovers of a previously eaten fly), or nothing at all. They allowed each male to interact with a female for up to 30 minutes, and observed the female responses.
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Erica McAlister, an entomologist at the Natural History Museum, knows that the link between sex and food is nowhere so direct as in the mating life of the sagebrush cricket: the meal with which this amorous little guy woos his sweet love is himself. To keep his lady friend engaged during sex, he turns his wings into her willing and delicious meal. “They’re quite meaty,” McAlister told the group.
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The new evidence shows that the sex hormones – testosterone, estrogen, and progesterone – act in a key region of the brain, switching certain genes on and others off.
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Animal behaviour | This is an updated version of an old piece, edited to include new information. Science progresses by adding new data to an ever-growing picture.
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As male rats become more sexually experienced parts of their brain disappear, whereas in females, these same parts seem to instigate sexual behaviour...
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The new Brazilian report about sex with animals has finally been published online. "Sex with Animals (SWA): Behavioral Characteristics and Possible Association with Penile Cancer.
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Scientists have uncovered the first evidence of a non-human species cultivating plants for use other than as food. Instead, bowerbirds propagate fruits used as decorations in their sexual displays.
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"Will they or won't they?" has been the classic tantalizing question behind the romantic tensions between TV couples. It's the same for pandas, except there's more at stake.
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Slovakian wildlife photographer Adrián Skippy Purkart captured a queen ant being ravaged by a swarm of males while having her brain sucked out of her head by a spider. This video was posted on the Amateur myrmecology Youtube channel.
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Complex evolution of the female diving beetle reproductive tract has resulted in crazy sperm diversity in male beetles, including 'sperm trains' thousands of cells long.
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Sex can be dangerous, even deadly if your partner has plans to eat you.
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A new study of the mating habits of mountain goats reveals the vastly different strategies of males in different populations and could shed light on the unseen impacts of hunting.
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A warning for zoophiles from MSNBC: For many people, bestiality is a bad joke, but for some it could be a matter of life or death, according to a new study...
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