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The giraffe’s long neck : From evolutionary fable to whole organism

A LONE GIRAFFE BULL STOOD at the edge of the scrubby bush forest that opened into a grassland. It was August, the beginning of spring, but also the middle of the dry season in the southern African savannah. The grasses and forbs were yellowed and brittle. Many trees and bushes had no leaves, though some still bore fruit, and others were just beginning to flower. The giraffe didn’t seem bothered by our presence, although we were off the main tourist track.

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Tactile encounters in a herd of captive giraffe

The behavior of the members of the herd of 18 giraffes at Taronga Zoo in Sydney, Australia, was studied for 5 months. The individuals were tolerant of each other, seldom fighting, not even over a receptive female. Sexually active males were the most active in initiating encounters. Calves showed little interest in the adult members of the herd. The 24-year-old male Ml, formerly the dominant male, seldom interacted with the other animals. Nosing and licking were the most common types

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"Necking" behaviour in the giraffe

Previous references to “necking” behaviour, and the main features of the study area are briefly outlined. “Necking” behaviour in giraffe takes place only in all male herds. When the animals are in a head to head posture the intensity is either high or low, but when animals take up a head to tail posture the actions are always of high intensity and appear to have greater sexual significance. The significance of “necking” is discussed, and it is suggested that these

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Winning by a neck – Sexual selection in the evolution of giraffe

A classic example of extreme morphological adaptation to the environment is the neck of the giraffe (Giraffa camelopardalis), a trait that most biologists since Darwin have attributed to competition with other mammalian browsers. However, in searching for present-day evidence for the maintenance of the long neck, we find that during the dry season (when feeding competition should be most intense) giraffe generally feed from low shrubs, not tall trees; females spend over 50% of their time feeding with their necks

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