Animals with Cocks - Coloring Book

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Barry, R.E.; Shoshani, J. (2000). " Heterohyrax brucei". Mammalian Species. 645: 1–7. doi: 10.1644/1545-1410(2000)645<0001:hb>2.0.co;2. S2CID 28256848. Naugher, K. B. (2004). "Anteaters ( Myrmecophagidae)". In Hutchins, M.; Kleiman, D. G; Geist, V.; McDade, M. С. (eds.). Grzimek's Animal Life Encyclopedia. Vol.13 (2nded.). Gale. pp.171–79. ISBN 978-0-7876-7750-3. Mating can be competitive, with a single flatworm fertilizing another. In other cases, like with the tiger flatworm, they can play both roles: each flatworm gives and receives sperm from its partner. Whale Hello There! Skurski, D.; Waterman, J. (2005). "Xerus inauris". Mammalian Species. 781: 1–4. doi: 10.1644/781.1. Linzey, Donald W. (28 December 2011). Vertebrate Biology. JHU Press. ISBN 978-1-4214-0040-2 . Retrieved 20 July 2013.

Blitz J.; Ploog D.W.; Ploog F. (1963). "Studies on the social and sexual behavior of the squirrel monkey (Saimiri sciureus)". Folia Primatologica. 1: 29–66. doi: 10.1159/000164879. Nasaw, Daniel (February 6, 2012). "When did the middle finger become offensive?". BBC News Magazine. BBC. Archived from the original on February 6, 2012 . Retrieved February 7, 2012. Bed bugs are famous for their aggressive, stabbing sex. Sometimes, overzealous males kill females with their saber-like penis in the process. Macdonald, D.W., ed. (2009). The Princeton Encyclopedia of Mammals. Princeton University Press. ISBN 978-0-691-14069-8. Marvalee H. Wake (15 September 1992). Hyman's Comparative Vertebrate Anatomy. University of Chicago Press. p.583. ISBN 978-0-226-87013-7. Archived from the original on 31 December 2013 . Retrieved 23 July 2013.John A. Byers (1997). American Pronghorn: Social Adaptations and the Ghosts of Predators Past. University of Chicago Press. ISBN 978-0-226-08699-6. Archived from the original on 1 January 2014 . Retrieved 15 July 2013. Fedigan L, Fedigan LM (1988). Cercopithecus aethiops: a review of field studies. Cambridge (UK): Cambridge University Press. pp.389–411. Jay Houston (2008-07-07). Ultimate Elk Hunting: Strategies, Techniques & Methods. Cool Springs Press. ISBN 9781616732813. Archived from the original on 2013-05-11 . Retrieved 2013-02-10.

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. Bart W. O'Gara; James D. Yoakum (2004). Pronghorn: ecology and management. University Press of Colorado. ISBN 978-0-87081-757-1. Archived from the original on 26 March 2014 . Retrieved 23 July 2013. The penis in most male Coleoid cephalopods is a long and muscular end of the gonoduct used to transfer spermatophores to a modified arm called a hectocotylus. That, in turn, is used to transfer the spermatophores to the female. In species where the hectocotylus is missing, the penis is long and able to extend beyond the mantle cavity and transfers the spermatophores directly to the female. Deepwater squid have the greatest known penis length relative to body size of all mobile animals, second in the entire animal kingdom only to certain sessile barnacles Penis elongation in Onykia ingens may result in a penis that is as long as the mantle, head and arms combined. [145] [146] Giant squid of the genus Architeuthis are unusual in that they possess both a large penis and modified arm tips, although it is uncertain whether the latter are used for spermatophore transfer. [145] Etymology

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Male and female emus are similar in appearance, [13] although the male's penis can become visible when he defecates. [14] Sometimes, 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.