
Physical Characteristics
The giraffe is the tallest living animal, uniquely adapted to reach
vegetation inaccessible to other herbivores. Giraffes have a
distinctive walking gait, moving both right legs forward, then both
left. At a gallop, however, the giraffe simultaneously swings the
hind legs ahead of and outside the front legs, reaching speeds of 35
miles an hour. It has unusually elastic blood vessels with a series
of valves that help offset the sudden build-up of blood (and to
prevent fainting) when the head is raised, lowered or swung quickly.
Giraffe "horns" are actually knobs covered with skin and hair above
the eyes that protect the head from injury.
Early written records described the giraffe as "magnificent in
appearance, bizarre in form, unique in gait, colossal in height and
inoffensive in character - ill mannered." Ancient cultures in Africa revered the
giraffe, as some modern cultures do today, and commonly depicted it
in prehistoric rock and cave paintings. Unknown outside of Africa,
this animal so excited man's curiosity that it was sometimes sent as
a diplomatic gift to other countries; one of the earliest records
tells of a giraffe going from "Melinda" (presumably Malindi) in
Kenya to China in 1415. The animal was thought to be a cross between
a camel and a leopard, a mistake immortalized in the giraffe's
scientific name of Giraffa camelopardalis.
Habitat
Giraffes are found in arid and dry-savannah zones south of the
Sahara, wherever there are trees.
Behaviour and Habits
The giraffe is non-territorial and social; it lives in very loose,
open herds with no specific leaders or coordination of herd
movement. This structure reflects that a giraffe’s size makes a
“safety in numbers” tactic unnecessary, and that the trees they feed
on tend to be spaced apart. Dominance between males is established
by “necking”—swinging heads at one another in tests of strength.
Nursery groups of young animals are left alone together during the
day while their mothers feed. The 6-foot-tall calf grows rapidly as
much as an inch a day. By 2 months the young giraffe is eating
leaves and at 6 months is fairly independent of its mother. A young
giraffe can even survive early weaning at 2 or 3 months. Although
few predators attack adult giraffes,
lions,
hyenas and
leopards take
their toll on the young. Scientists report that only a quarter of
infants survive their first year of life.
Diet
When protected, giraffes can flourish in areas where food is
abundant year round. Although they drink water when it's available,
they can survive where it is scarce. They occasionally eat grass and
fruits of various trees and shrubs, but their principal food source
is the acacia tree. The tree's sharp horns do not seem to stop the
giraffe, which has a long, muscular tongue specially adapted to
select, gather and pluck foliage. The giraffe is a selective feeder
and although it feeds 16 to 20 hours a day, it may consume only
about 65 pounds of foliage during that time. It can maintain itself
on as little as 15 pounds of foliage per day.
Predators and Threats
Giraffe tails are highly prized by many African cultures. The desire
for good-luck bracelets, fly whisks and thread for sewing or
stringing beads have led people to kill the giraffe for its tail
alone. Today, Giraffes are easily killed through poaching for
their meat and hide.
Thought You Should Know
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Despite its long neck, the giraffe has only seven vertebrae,
exactly the same number as man and most other mammals.
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Even though giraffes are often seen together in groups, they do
not form the complex social groups of many plains species. Theirs
are loose associations, constantly changing in make-up.