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  2. Hemipenis - Wikipedia

    en.wikipedia.org/wiki/Hemipenis

    The hemipenis is the intromittent organ of Squamata, [4] which is the second largest order of vertebrates with over 9,000 species distributed around the world. They differ from the intromittent organs of most other amniotes such as mammals, archosaurs and turtles that have a single genital tubercle, as squamates have the paired genitalia remaining separate. [5]

  3. Cloaca - Wikipedia

    en.wikipedia.org/wiki/Cloaca

    Cloaca of a red-tailed hawk. A cloaca (/ k l oʊ ˈ eɪ k ə / ⓘ kloh-AY-kə), pl.: cloacae (/ k l oʊ ˈ eɪ s i / kloh-AY-see or / k l oʊ ˈ eɪ k i / kloh-AY-kee), or vent, is the rear orifice that serves as the only opening for the digestive (), reproductive, and urinary tracts (if present) of many vertebrate animals.

  4. Penis - Wikipedia

    en.wikipedia.org/wiki/Penis

    Most male birds (e.g., roosters and turkeys) have a cloaca (also present on the female), but not a penis. Among bird species with a penis are paleognaths (tinamous and ratites) [11] and Anatidae (ducks, geese and swans). [12] The magpie goose in the family Anseranatidae also has a penis.

  5. Penile spines - Wikipedia

    en.wikipedia.org/wiki/Penile_spines

    Felines, especially domestic cats, are well known for having penile spines. Upon withdrawal of a cat's penis, the spines rake the walls of the female's vagina, which may serve as a trigger for ovulation. [4] [5] Many other felid species have penile spines, but they are relatively small in jaguars and pumas, and do not occur in margays. [6]

  6. Intromittent organ - Wikipedia

    en.wikipedia.org/wiki/Intromittent_organ

    Birds are one of the only groups which reproduce through internal fertilization but have repeatedly lost the intromittent organ. [29] Male ostriches have a conical shaped penis that is wider at the base. [30] A functional intromittent organ is known to be present in most species of Paleognathae and Anseriformes. [26]

  7. Cockfighting - Wikipedia

    en.wikipedia.org/wiki/Cockfighting

    Chickens from the Harappan culture of the Indus Valley (2500–2100 BC) may have been the main source of diffusion throughout the world." Also, "Within the Indus Valley, indications are that chickens were used for sport and not for food (Zeuner 1963)", cited in R.D. Crawford (1990). and that by 1000 BC they had assumed "religious significance". [8]

  8. Chick sexing - Wikipedia

    en.wikipedia.org/wiki/Chick_sexing

    Vent sexing in Wenchang, Hainan, China (2014). Vent sexing, also known simply as venting, involves squeezing the feces out of the chick, which opens up the chick's anal vent (called a cloaca) slightly, allowing the chicken sexer to see if the chick has a small "bump", which would indicate that the chick is a male.

  9. Category:Mammal penis - Wikipedia

    en.wikipedia.org/wiki/Category:Mammal_penis

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