Female ducks have evolved an intriguing way to avoid becoming impregnated by undesirable but aggressive males endowed with large corkscrew-shaped penises: vaginas with clockwise spirals that thwart oppositely spiraled males.
Plants & Animals
Dec 23, 2009
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0
Female fish in the Bahamas have developed ways of showing males that "No means no."
Evolution
Aug 19, 2015
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85
A team of researchers from China, the U.K. and the U.S. has found that a species of darkling beetles engage in oral sex prior to copulating. In their paper published in the journal Ecology and Evolution, the group describes ...
New research into the anatomy of the primate clitoris using sophisticated imaging technology reveals the wild variation in clitoral form between primate species.
Plants & Animals
Jul 6, 2023
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21
The road that connects also divides. This dichotomy – half-century-old roads connecting portions of Bahamian islands while fragmenting the tidal waters below – leads to rapid and interesting changes in the fish living ...
Evolution
Nov 5, 2014
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When it comes to genitalia, nature enjoys variety. Snakes and lizards have two. Birds and people have one. And while the former group's paired structures are located somewhat at the level of the limbs, ours, and the birds', ...
Evolution
Nov 5, 2014
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New research from evolutionary biologists at the University of Toronto shows that the male guppy grows claws on its genitals to make it more difficult for unreceptive females to get away during mating.
Plants & Animals
Aug 2, 2013
1
0
Male Callosobruchus chinensis seed beetles have spines on their genitalia, which increase their fertilization success but injure a female's reproductive tract—especially a female of a related species called Callosobruchus ...
Evolution
May 19, 2015
0
101
Discerning males remain faithful ... if you are a spider. Sex for male orb web spiders (Argiope bruennichi) is a two shot affair since the act of mating destroys their genitalia. If they survive being eaten during their first ...
Plants & Animals
Apr 24, 2012
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0
(Phys.org)—Researchers working in China have discovered an insect that lived 165 million years ago that they believe used its wings to mimic the leaves of an ancient ginkgo tree. The fossil finding, the team writes in their ...
