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Longest bird penis

Argentine lake duck sporting a 42.5cm penis. Credit: Kevin G. McCracken et al (<a href="http://scienceblogs.com/clock/2006/07/friday_weird_sex_blogging_the_1.php" target="newwin">Source</a>)<!--break--><br /> See: "<a href="http://www.world-sex-records.com/longest-bird-penis.htm">Longest bird penis</a>"<br />
Argentine lake duck sporting a 42.5cm penis. Credit: Kevin G. McCracken et al (Source)
Many birds do not have penises, and mate by touching genital openings -- called a "cloacal kiss". But some species of duck and ostriches do have a penis.

The longest bird penis discovered belongs to the Argentine lake duck (Oxyura vittata), measured at around 42.5cm, an astonishing dimension matches the length of an adult male, and compares to the length of an ostrich penis. If the Argentine lake duck were human, we could boast 5 - 6-foot penises!

It is not known why the duck has such a long penis, or even how it is used during mating; the penis is also covered with spines, though the tip is soft and brush-like. it is noted that the duck is promiscuous and boisterous in its sexual activity.

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