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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]
Many mammalian species have developed keratinized penile spines along the glans or shaft, which may be involved in sexual selection.These spines have been described as being simple, single-pointed structures or complex with two or three points per spine (strepsirrhines). [1]
When rubbing trees with their horns, these stags sometimes move the penis back and forth rapidly inside its sheath. [10] Male bison and fallow deer have tufts of fur at the end of their penis sheaths. [11] In rodents, the length of the prepuce is related to urine marking behavior. [12]
A notable example of a bird with a pseudo-penis is the red-billed buffalo weaver, which do not use their pseudo-penis for direct insertion during copulation; however it does play a part in successful mating and stimulation. [15] Similarly to the red-billed buffalo weaver, the cassowary, a ratite, exhibits a pseudo-penis in both males and females.
Baculum of a dog's penis; the arrow shows the urethral sulcus, which is the groove in which the urethra lies. Fossil baculum of a bear from the Miocene. The baculum (pl.: bacula), also known as the penis bone, penile bone, os penis, os genitale, [1] or os priapi, [2] is a bone in the penis of many placental mammals.
Animal non-reproductive sexual behavior encompasses sexual activities that non-human animals participate in which do not lead to the reproduction of the species. Although procreation continues to be the primary explanation for sexual behavior in animals, recent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. [1]
More: 6 animals that mate for life: See the enduring pairs and learn about their love languages. Nearly a decade later, a second crayfish was spotted at an apartment complex pond in Texas in 2022 ...
The flehmen response (/ ˈ f l eɪ m ən /; from German flehmen, to bare the upper teeth, and Upper Saxon German flemmen, to look spiteful), also called the flehmen position, flehmen reaction, flehmen grimace, flehming, or flehmening, is a behavior in which an animal curls back its upper lip exposing its front teeth, inhales with the nostrils usually closed, and then often holds this position ...