Most birds do not have a penis. Most birds have a little lump called a cloaca. During the breeding season when hormones are flowing the cloaca swells and birds can get a cloacal protuberance. Both sexes have the cloaca, so for most birds sex literally is about bumping uglies. They do not have lengthy love making periods, but fast 1 to 3 second copulations that can happen hundreds of times a day. However, for a few species, things gets…weird.
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How Birds Lost Their Penises | Genital Evolution | Live Science
Types of Birds : Birds are some of the most successful vertebrate animals on Earth. There are more than 9, bird species, and they are spread over the whole planet, from the poles to the equator. Ornithology is the study of birds, and it comes under branches of zoology. Due to their ability to fly, birds have managed to occupy unique ecological niches, which helped them survive the demise of their close relatives — dinosaurs. The birds share some characteristics with another closely related class — Reptiles , but they also have some features that are unique to these fantastic creatures. Let us go through their main traits.
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A chick embryo's developing penis colored red prior to regression. But 97 percent of bird species have lost the ability to grow a penile structure capable of penetration over the course of evolution. They mate instead by rubbing together small openings called cloacae, in a maneuver called a cloacal kiss. Reported in a study published yesterday June 6 in Current Biology , researchers have identified a gene responsible for repressing the development of phalluses in bird species.
The term penis applies to many intromittent organs , but not to all. As an example, the intromittent organ of most cephalopoda is the hectocotylus , a specialized arm, and male spiders use their pedipalps. Even within the Vertebrata there are morphological variants with specific terminology, such as hemipenes. In most species of animals in which there is an organ that might reasonably be described as a penis, it has no major function other than intromission, or at least conveying the sperm to the female, but in the placental mammals the penis bears the distal part of the urethra , which discharges both urine during urination and semen during copulation. Most male birds e.
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Wow. I should like put this on my wall to motivate me. All us sissies should have goals in life.
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