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During copulation, and only after the male's penis is fully inside the female's vagina, the bulbus glandis becomes engorged with blood. [1] When the female's vagina subsequently contracts, the penis becomes locked inside the female. [12] This is known as "tying" or "knotting". While characteristic of mating in most canids, the copulatory tie ...
For domestic dogs the tie may last up to half an hour or more, though usually less. [7] When male canines are sexually excited, the bulbus glandis may swell up inside the penile sheath, even if the dog has been neutered. [8] The bulbus glandis also occurs in the penises of some pinnipeds, including South American fur seals. [9]
Male felids are able to urinate backwards by curving the tip of the glans penis backward. [54] [55] In cats, the glans penis is covered with spines. Penile spines also occur on the glans of male and female spotted hyenas. [54] In male dogs the glans penis is smooth and consists of two parts called the bulbus glandis and pars longa glandis. [56]
Sex organs are typically differentiated into male and female types. In animals (including humans), the male sex organs include the testicles, epididymides, and penis; the female sex organs include the clitoris, ovaries, oviducts, and vagina. The testicle in the male and the ovary in the female are called the primary sex organs. [1]
In some bat species, the prepuce contains an erectile tissue structure called the accessory corpus cavernosum. [6] Penile sheath of a Great Dane. During musth, a male elephant may urinate with the penis still in the sheath, which causes the urine to spray on the hind legs. [7] Male dogs have a conspicuous penis sheath. [8]
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]
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The male sings when storms approach and again when storms have passed. [45] In addition to its song, the species has a number of calls used for communicating specific information, such as when a ground predator approaches and when a nest or another American robin is being directly threatened.