In many bird species, males don't grow specialized organs to deliver sperm. Ducks typically do, their penises sometimes reaching considerable lengths ( 9.8 inches for a ruddy duck , more than half its body length). 2 Aug 2010
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28 Sept 2017 · Male ducks respond to sexual competition by growing either an extra-long penis or a nub of flesh, a new study finds.
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30 Jul 2010 · Ducks typically do, their penises sometimes reaching considerable lengths (25 centimeters for a ruddy duck, more than half its body length).
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20 Sept 2017 · Growing up in an all-male environment makes some duck species grow larger penises and others delay sexual maturity, according to a new study ...
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25 Apr 2022 · The record holder is a specimen from Argentina, at 42.5cm long when fully unwound, compared to an average body length of 36-46cm. For comparison ...
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22 Dec 2009 · Normally, the duck keeps its penis inside-out within a sac in its body. When the time for mating arrives, the penis explodes outwards to a fully ...
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21 Sept 2017 · Compared to the more humbly proportioned and perhaps emotionally sensitive lesser scaup – which is monogamous throughout a mating season – ruddy ...
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22 Sept 2017 · At full length, the duck's penis can reach 20 cm – but that is not the interesting part. A duck's penis is corkscrew-shaped, with ridges and ...
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14 Sept 2001 · The male Argentine Lake Duck and his 42.5 cm penis (Pic: K. McCracken/Nature). Related Stories. Grunters not guffawers get the girl, Science ...
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19 Sept 2017 · These ducks formed dominance hierarchies. One male at the top grew a really long penis and kept it throughout the breeding season. Subordinate ...
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22 Aug 2014 · Male muscovy ducks, for example, have corkscrew-shaped penises that spring out from their body in less than half a second and are 20cm long ...
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13 Oct 2014 · A duck penis can measure anywhere between 1.25 centimetres, to over 40 centimetres long. The Argentine lake duck (Oxyura vittata) from South ...
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14 Oct 2011 · Most of these birds, however, rival human length at approximately 6-8 inches (if you're lucky!). The Argentine lake duck appears to be an ...
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Most birds lack genitalia, but male ducks are known for their long, spiraling penises, which have evolved through an ongoing cat-and-mouse game with females.
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