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Males typically have thicker ossicones that become bald on top due to frequent necking. [4] In okapi, the male's ossicones are smaller in proportion to the head, and taper towards their tips, forming a sharper point than the comparatively blunt giraffe ossicone. Whereas female giraffes have reduced ossicones, female okapi lack ossicones entirely.
Gemina was seen tumbling end over end when she was two years old. However, tests found no sign of injury at the time, and there is no evidence that the accident caused the neck deformity. [2] Gemina gave birth to a calf in 1991, [2] but the calf died of pneumonia soon after birth. [2]
The coat patterns of modern giraffes may also have coincided with these habitat changes. Asian giraffes are hypothesised to have had more okapi-like colourations. [6] The giraffe genome is around 2.9 billion base pairs in length, compared to the 3.3 billion base pairs of the okapi. Of the proteins in giraffe and okapi genes, 19.4% are identical.
A Penn State researcher has been trying to get to the bottom of the age-old question of why giraffes have long necks. Focus on research: Female giraffes drove the evolution of long necks, new ...
Giraffes, just like humans, have seven cervical vertebrae. Unlike humans, giraffe cervical vertebrae are attached to each other with ball and socket joints, making them able to bend their necks in ...
The three subspecies of northern giraffe officials are proposing to be listed as endangered include the West African, Kordofan and Nubian giraffes, whose populations have plummeted by roughly 77% ...
Often mistaken with the Southern Giraffes, Northern giraffes can be differentiated by the shape and size of the two distinctive horn-like protuberances known as ossicones on their foreheads; they are longer and larger than those of southern giraffes. Bull Northern giraffes have a third cylindrical ossicone in the center of the head just above ...
Giraffes have those long necks — so it stands to reason that sometimes things will fall out of place. Standing on a platform high above the ground, Whitley slowly manipulated the giraffe's neck ...