Any whose genital evolutionary pattern resembles a Cold War arms race deserves some attention from the scientific community. The complexity of male and female ducks’ reproductive organs indicates just this. Their reproductive organs have co-evolved in a “sexual arms-race” resulting in large corkscrew phalluses and complicated vaginal tracts.
Nov 28, 2012 · Kurt Vonnegut, in an interview on the Daily Show, gave his opinion on human nature. “We are terrible s,” he said. “I think that the Earth’s immune sy
A penis (plural penises or penes /-n iː z /) is the primary sexual organ that male s use to inseminate sexually receptive mates (usually females and hermaphrodites) during copulation. Such organs occur in many s, both vertebrate and invertebrate, but males do not bear a penis in every species, and in those species in which the male does bear a so-called penis…
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Hi, I overlook a family of mallard – a female and 4 ducklings who are now about 3 weeks old. There is a male usually in close proximity but he doesn’t normally engage with the female in any way.
The Anatidae are the biological family of birds that includes ducks, geese, and swans.The family has a cosmopolitan distribution, occurring on all the world’s continents.These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water.The family contains around 146 species in …
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Trying to tell the difference between a male and female raccoon from their markings alone is nearly impossible.
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The male walrus has the biggest penis bone in the kingdom – 66cm (Picture: Mark Warren/nrbo.co.uk) If you think porn’s messed up then frankly you should check out some of the dubious sexual practices that go down in the kingdom.