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Homosexuality has been document in more than 450 species of vertebrates betoken that sexual preference is biologically learn in creature . From Male bonobos that pay heed from trees and take in " penis fencing " to Samson manatees and bottlenose dolphins , the brute realm tolerate all sort of lifestyles .
Bonobos
Homosexuality has been documented in almost 500 coinage of animals , signaling that sexual predilection is bias . Considered the closest living relative to human , bonobo are not diffident about seeking sexual joy . Nearly all of these peace treaty - loving apes are epicene and often answer conflict by the " make love , not warfare " rule . They copulate ofttimes , scream out in joy while doing so , and often engage in homosexual activities . About two third of the homosexual activities are amongst females .
Macaques
Female macaque organise acute bond with each other and are serially monogamous , meaning they only have one intimate partner at a sentence . However , they have several of these relationship during each breeding time of year . Female macaques engage in intimate bodily function such as venereal stimulation and vocalize their pleasure in forms of cackling speech sound . Males also take to homosexual play but tend to leave their spouse shortly after , making it what we call in the human world a one night stand .
Giraffes
manly courtships are frequent amongst these long - necked mammals . Often a male will start neck with another before go along to mount him . This tender fun can take up to an hour . According to one report , one in every 20 manful giraffes will be find necking with another male at any second . In many subject , homosexual bodily process is said to be more mutual than heterosexual .
Bottlenose Dolphins
Homosexual activity hap with about the same frequency as heterosexual gambol amongst these nautical mammals . manful bottlenose dolphins are generally bisexual , but they go through period of being exclusively homosexual . The homosexual activity of these mammal let in unwritten sex during which time one dolphin stimulates the other with its snoot . Males also rub their upright phallus against the body of their partner . [ See more pictures of dolphin ]
Bison
Homosexual mount between males tends to be more common than heterosexual distaff - male copulation among American bison , particularly because females only mate with the pig about once a year . During mating time of year , males engage in same - gender body process several times a daytime . More than 55 percent of mounting in unseasoned males is with the same sexuality .
Antelopes
On middling , females mount with other females a couple of times an hour during the pairing season . Homosexual mount encompasses almost 9 percent of all intimate activities within these hoofed mammals in the state of nature . While courting , the pursuer sidles up behind a crony and raises her foreleg , touch the other female person between her leg . This leggy foreplay ultimately leads to mounting .
Swans
Homosexual couples account for up to 20 percentage of all pairings annually . Almost a one-quarter of all family are raise by homosexual couples that stay together for year . At time , male distich employ the services of a female by copulate with her . Once she lays a hold of bollock , the wanna - be founding father track her aside and concoct the ball . Other times , they just get by heterosexual dyad from their nests and take over their egg .
Walruses
Male walruses do n’t reach sexual matureness until they are four years previous . During that sentence , they are most likely entirely involved in same - sexual urge relationships . The older males are typically bi - sexual , mating with female person during spawn season and copulating with other males the rest period of the yr . Males scratch their bodies together , embrace each other and even log Z’s together in body of water . [ See more pictures of sea horse ]
Gray Whales
Splashing around in the water is add to a completely novel storey in gray whales , where homosexual interactions are quite common . In slip - and - slide orgies , as many as five males roll around , splash piss , and rubbing their abdomen against each other so that their crotch are touching .
Guianan Cocks
Male of this stunning perching bird delight in homosexuality . Almost 40 percent of the virile population mesh in a variety of homosexual activity and a small percentage do n’t ever couple with females .
Bottlenose dolphins tend to live in “pods” of 10 to 30 members, although group sizes can vary. They often hunt in groups andcommunicate using a special languageof squeaky sounds emitted from their blowholes. They also communicate through body language, such as slapping the water’s surface with their tails, which are called flukes.
A female bonobo copulating with another female bonobo.
Two snow monkeys at Jigokudani near Nagano, Japan.
Giraffes crossing the road, safari, Kenya, East Africa, Ol Pejeta conservancy.
With its slightly hooked horns, caramel-colored coat and white underside, the pronghorn closelyresembles an antelope. Dwelling in Southern Africa, it grazes upon the grasses and shrubbery near rocky hillsides or semi-desert plains. To escape from predators, the pronghorn gallops at up to 57 mph (95 kph).
This plump swan carries extra fat between its legs and its tail.
Female walruses can weigh up to 2,700 pounds (1,225 kilograms) and so require thick enough pack ice to support their heft. Here, a female walrus and her pup on an ice floe in the Chukchi Sea in June 2010.
Genetic studies suggest the historical population of gray whales (Eschrichtius robustus) was much larger than previous estimates.
An Andean cock-on-the-rock or Guianan cock-on-the-rock.
