There's still confusion among experts about how many giraffe species and subspecies really exist.

Giraffes are the tallest animals
in the world. Males can grow up to 18 feet (5.5 meters) tall, females
can reach 14 feet (4.3 m) tall and their babies, called calves, are born
around 6 feet (1.8 m) tall. Calves can grow up to an inch a day.
Like a human fingerprint, each giraffe's coat is unique. Some
subspecies have patterns that look like oak leaves, while others have
square-shaped patterns tha
t make the giraffe look like it's covered by a
net. Their coat colors vary from white to light tan to nearly
black, depending on what they eat and where they live. Some experts think that the patterns are for camouflage.
In the wild, giraffes will sleep only about 20 minutes a day — and
usually not more than five minutes at a time — as they need to stay
alert to watch for predators.
All giraffes have two hair-covered horns called ossicones. Male
giraffes use their horns to playfully fight with one another. They also
spar by swinging their heads at one another and entwining their necks,
which is called "necking." [Images:
Animals' Dazzling Headgear]
Like camels, giraffes can go for a long time without drinking water
because their diet — especially acacia leaves, their favorite food —
contains a lot of water. When they do get thirsty, they have to bend down awkwardly
to drink, which makes them easy targets for predators. To help protect
themselves, giraffes usually go to watering holes together and take
turns watching for predators.
Giraffes are herbivores, and they eat leaves, buds and branches from
mimosa and acacia trees. Their height helps them reach food well above
where other animals can reach. A giraffe may eat more than 75 pounds (34
kilograms) of food each day. Because they get just a few leaves in
every bite, they spend most of their day eating.
Acacia trees have long thorns that deter most animals — but not
giraffes. Their 18-inch (46-centimeter) tongues can reach around the
thorns, and their thick, sticky saliva coats any thorns they might
swallow. The dark blue-gray color of a giraffe's tongue helps protect it
from sunburn while the giraffe is reaching for tree leaves.
Giraffes are ruminants, like cows, and their stomachs have four
compartments that digest the leaves they eat. After a giraffe swallows a
mouthful of leaves once, a ball of already-chewed leaves, or cud, will
make its way back up the throat for more grinding.
Giraffes can breed anytime throughout the year. A male will sort of
flirt with a female in heat, sometimes feeding beside her and tangling
necks with her. Females give birth to a single calf about 14 months
after they mate.
When a giraffe calf is born,
it drops to the ground head first from about 6 feet (1.8 meters) high.
The fall surprises the calf and makes it take a big breath, but doesn't
really hurt it. The calf can walk after about an hour, and it can run
with its mom just 10 hours after it's born. After they're a few weeks
old, calves join a group of young giraffes called a crèche.
Giraffes can live up to 25 years in the wild and longer in captivity.
Where giraffes live:
Giraffes used to live throughout arid and dry-savanna zones of
sub-Saharan Africa, wherever there were trees. Now their range has
shrunk due to habitat loss. Most giraffes live in wooded savannas, open
woodlands and riparian forests, in east Africa and the northern parts of
southern Africa, where they're protected by national parks.
West African Giraffes only survive in the wild, and the only known population lives in southwestern Niger.
The only remaining wild population of Ugandan Giraffes is in Murchison
Falls National Park, Uganda. They've also been re-introduced to six
sites in Kenya and one other site in Uganda.
Conservation status: Least Concern to Endangered
Overall, the species is of least concern, but the subspecies listed
above, the West African Giraffe and the Ugandan Giraffe, are both
endangered.
Giraffes are widespread throughout Africa, and their population totals
more than 100,000. Experts believe their numbers are shrinking due to
habitat loss and poaching, so the species may soon be listed as
threatened.
The West African Giraffe is endangered. There are currently fewer than
200 individuals in this subspecies, though experts think they're on the
rise thanks to conservation programs.
The
Ugandan Giraffe is also endangered. There are fewer than 2,500
individuals in this subspecies, and experts are worried that this number
is shrinking.
Odd facts:
Giraffes look a little like a cross between a camel and a leopard: They
have a small hump on their back and a spotted coat. People used to call
the giraffe a "camel-leopard," and that's how the giraffe got its
species name
, camelopardalis.
A giraffe's foot is 12 inches (30 centimeters) across — about the size of a dinner plate.
A giraffe's neck is 6 feet (1.8 m) long and weighs about 600 pounds (272 kg).
A giraffe's back legs look shorter than its front legs, but they're really about the same length — 6 feet (1.8 m).
A giraffe's heart is 2 feet (0.6 meters) long and weighs about 25 pounds (11 kg).

For a long time people thought giraffes were mute, but they actually
communicate by emitting moans or low notes that humans can't hear. They
can also whistle, hiss, moo and roar.
Besides humans, gir
affes' only predators are
lions and crocodiles.
Giraffes can defend themselves with a deadly kick when they need to.
Many male giraffes check whether a female's in heat by nudging her to
make her pee. They can usually tell by smell, but some males will even
taste the urine to see if she's ready to mate.
Giraffes have the same number of vertebrae in their necks as we do — seven. Each one can be over 10 inches (25.4 cm) long.
Giraffes run by moving their front and back legs on one side forward
together. Their funny gait makes them pretty fast: The record running
speed of a giraffe is 34.7 mph (56 kph).