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It is also called the Argentine blue-bill, Argentine blue-billed duck, Argentine lake duck, or Argentine ruddy duck. Contents. 1 Description. Penis.

This has extended an earlier estimate of the length of the duck's corkscrew-​shaped penis, which was 20cm. "It's a fascinating bit of anatomy they'.

Figure 1c-f shows that -galactosidase is expressed along the entire root system in the alfalfa control, whereas blue product is almost absent in roots treated with. It is notable for possessing, in relation to body length, the longest penis of all vertebrates; the penis, which is coiled up in flaccid state, can reach about the same.