Stallions (male horses) have a vascular penis. When non-erect, it is quite flaccid and contained within the prepuce (foreskin, or sheath). Rietstap, J. B. (1884). "Armorial général; précédé d'un Dictionnaire des termes du blason". G. B. van Goor zonen: XXXI. Vilené: se dit un animal qui a la marque du sexe d'un autre émail que le corps {{ cite journal}}: Cite journal requires |journal= ( help)

Giustina, Anthony (31 December 2005). Sex World Records. Lulu.com. p.152. ISBN 978-1-4116-6774-7. Archived from the original on 11 October 2013 . Retrieved 3 October 2012. Wikimedia Commons has media related to Mammal penis. External male genitalia of a Labrador Retriever Dale R. McCullough (1969). The tule elk: its history, behavior, and ecology. University of California Press. ISBN 978-0-520-01921-8 . Retrieved 22 July 2013.

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Fritz R. Walther (1984). Communication and expression in hoofed mammals. Indiana University Press. ISBN 978-0-253-31380-5. Archived from the original on 12 October 2013 . Retrieved 5 July 2013. The long-dead woolly mammoth will make its return from extinction by 2027, says Colossal, the biotech company actively working to reincarnate the ancient beast.

Dolphins are known for their intelligence, promiscuity and absurdly dexterous penises. They have a prehensile penis, meaning it can swivel, grab and grope, much like a human hand. A prehensile penis helps males navigate the complex, labyrinth-like reproductive tracts of female dolphins. A highly social, sentient and long-lived animal remains in the L.A. Zoo in spite of overwhelming and conclusive evidence that no city zoo, no matter how well-intentioned or well-funded, can provide adequately for such a large animal. As of 2015 [update], a systematic review of 15,521 men, who were measured by health professionals rather than themselves, concluded that the average length of an erect human penis is 13.12cm (5.17 inches) long, while the average circumference of an erect human penis is 11.66cm (4.59 inches). [118] [119] MarsupialsThe human penis is an external sex organ of male humans. It is a reproductive, intromittent organ that additionally serves as the urinal duct. The main parts are the root of the penis (radix): It is the attached part, consisting of the bulb of penis in the middle and the crus of penis, one on either side of the bulb; the body of the penis (corpus); and the epithelium of the penis consists of the shaft skin, the foreskin, and the preputial mucosa on the inside of the foreskin and covering the glans penis. Feldhamer, George A.; Thompson, Bruce C.; Chapman, Joseph A. (2003). Wild mammals of North America: biology, management, and conservation (2nded.). Baltimore, Md.: Johns Hopkins University Press. p.432. ISBN 9780801874161. Archived from the original on 2013-11-04 . Retrieved 2013-11-08. The fact that the team have managed to extract some from the fossils on Sicily means that it will hopefully open things up for the same to be done with fossils from Italy, the rest of Southern Europe and potentially those from Africa. Samuel I. Zeveloff (2002). Raccoons: A Natural History. UBC Press. pp.5–. ISBN 978-0-7748-0964-1. Archived from the original on 26 March 2014 . Retrieved 25 July 2013.

Willingham explains that this violent process has caused bedbugs to evolve “something very vagina-like where they tend to get stabbed.” This special less-armored area of their abdomen might minimize harm as the male injects his sperm into the female’s circulatory system. Gender-Bending GenitalsSometimes, penises pose logistical challenges. That is certainly the case for the leopard slug, which is so well-endowed that it has to go to extreme measures to reproduce.

Percequillo, A.R.; Weksler, M.; Costa, L.P. (2011). "A new genus and species of rodent from the Brazilian Atlantic Forest (Rodentia: Cricetidae: Sigmodontinae: Oryzomyini), with comments on oryzomyine biogeography". Zoological Journal of the Linnean Society. 161 (2): 357–390. doi: 10.1111/j.1096-3642.2010.00643.x. Würsig, Bernd; Wursig, Melany (2009-07-17). The Dusky Dolphin: Master Acrobat Off Different Shores - Bernd G. Würsig, Bernd Wursig, Melany Wursig. ISBN 9780080920351. Archived from the original on 2013-10-11 . Retrieved 2012-11-22. Willie is a white elephant, the star of a National Savings scheme poster exhorting the message "If you don't need it - don't buy it!" This film brings him to life, and he steps down from the wall to become a volunteer collector – one so successful that naughty children even put down their cigarettes to follow him. This charming animation is filled with winning touches, such as Willie turning himself into a film projector with a cranking tail. Bed bugs are famous for their aggressive, stabbing sex. Sometimes, overzealous males kill females with their saber-like penis in the process. Using the estimated age of the Puntali elephant fossil, the size and mass of the straight-tusked elephant, and the estimated start of the dwarfing process, the team was able to calculate size and body mass reduction rate per year and per generation.New data on armadillos (Xenarthra: Dasypodidae) for Central Patagonia, Argentina." Agustin M. Abba, et al. In Transandinomys talamancae, the outer surface of the penis is mostly covered by small spines, but there is a broad band of nonspinous tissue. [96] Reena Mathur (2009). Animal Behaviour 3/e. Rastogi Publications. ISBN 978-81-7133-747-7. Archived from the original on 26 March 2014 . Retrieved 23 July 2013.