Common
Name: |
Southern
White Rhinoceros
|
|
Scientific
Name: |
Ceratotherium
simum simum |
Family: |
Rhinocerotidae |
Order: |
Perissodactyla |
Class: |
Mammalia |
Range: |
Central
and southern Africa |
Habitat: |
Long
and short grass savannas |
Description: |
Large,
neutral gray and almost hairless body; large head with two horns –
the horn closest to the eyes is typically smaller; height –
5 to 6 feet at the shoulder; weight – 4,000 to 5,000 lbs. |
Life
Expectancy: |
40-60
years |
Sexual
Maturity: |
Females
– 6 to 7 years; males – 10 to 12 years; in captivity,
sexual maturity can be reached in a shorter period of time because
there is no feast or famine situations and the quality of the food
is usually very high. |
Diet: |
In
the wild, they eat grasses and herbs. In the Zoo, they are fed apples,
grain and hay. |
Status: |
CITES
II, IUCN – Low Risk, Conservation, AZA - SSP |
Behaviors: |
The
white rhinoceros is the most social of the five species of rhinos.
Immature individuals may pair up or form larger groups. Sexually mature
females lacking calves frequently join them or accept the company
of one or more of these immature rhinos. In this way persistent groups
numbering up to seven individuals may be formed. Larger groups may
form around favorite resting areas or feeding areas.
Females move over home ranges covering 3.5 to 5.8 square miles
with temporary extensions when food and water supplies run out.
These home ranges overlap extensively with other female ranges,
and there is no indication of territoriality among females. When
females do meet, they engage in “friendly” nose-to-nose”
meetings. Sub-adults will approach adult females, calves and immatures
for nose-to-nose meetings and playful wrestling matches.
Males are typically solitary and territorial. They fight by jabbing
one another with upward blows of their horns. One or more subordinate
males may reside within a dominant male’s territory. Subordinate
males do not spray urine, scatter their dung or try to consort with
any receptive females. When confronted by the dominant male, the
subordinate male utters load roars and shrieks. Females use similar
roars to warn off males that approach too close. These confrontations
are usually brief. But, if an intruding subordinate male is found
by the holder of the territory, a more prolonged and tense confrontation
may ensue which may climax with a vicious fight.
Access by males to receptive females is controlled by the strict
territorial system. Prime breeding males occupy mutually exclusive
areas covering 200 to 650 acres. These males form consort attachments
to any females coming into heat that they encounter. The male endeavors
to confine the receptive female within his territory for 1-2 weeks
until she is ready for breeding. If, however, she crosses the boundary
into neighbor’s territory, the male will not follow.
When two dominant male’s meet at their neighboring boundaries,
they stare silently at one another, horn to horn. Then they back
away and wipe their horns on the ground. This ritual confrontations
may be repeated several times or for up to an hour before they move
apart and return to the heart of their domains. The point at which
this ceremony takes place is the common boundary between their respective
territories.
All rhinos are basically water dependent, drinking daily from small
pools or rivers. But under arid conditions, both African species
can survive for periods of 4 to 5 days between waterhole visits.
Rhinos are also dependent on waterhole visits for wallowing. The
African species more commonly can roll completely over to acquire
their mud coat. The mud helps to protect the rhino from biting flies
and parasites. It can also act as a sunscreen. Despite the thick
skin, blood vessels lie just under the thin outer layer.
|
Adaptations: |
White
rhinos are grazing herbivores and need a large daily intake to support
their massive size. Their broad lips give them a large bite area,
enabling them to obtain an adequate rate of intake from the short
grasses they favor for much of the year.
Vision is poor in rhinos, however acute senses of hearing and smell
make up for their lack of good eyesight.
|
Special
Interest: |
The
genus name Ceratotherium comes from the Greek cerato, meaning “horn”,
and therium, meaning “wild beast.” The species name simum
comes from the Greek simus, meaning “flat-nosed.”
Folklore: The name of the “white” rhino and of its
“black” rhino counterpart tends to be misleading. These
names probably arose from the local soil color that had tinted the
first specimens seen. Another story often retold on this subject
cites a mistranslation as the culprit for the misnomers. Upon arriving
in Africa, early Dutch explorers described the white rhino as having
a wide upper lip. “Wide” in Dutch (weit) was pronounced
“wheat” and mistranslated as “white.” The
white rhino’s wide upper lip enables it to graze.
|
Folklore: |
n/a |
Conservation: |
Today
in Africa there are estimated to be over 8400 Southern white rhinos
surviving, more than all of the other four subspecies of rhinos combined.
South Africa’s decades of intense conservation has preserved
this subspecies as over 8,000 can be found in that country today.
The Northern white rhino (Ceratotherium simum cotoni), however, is
critically endangered. There are only 25 remaining worldwide. |
Jacksonville
Zoo History: |
Southern
white rhinos have been on exhibit here since the first pair arrived
in April 1967. A dozen births have occurred here making the Jacksonville
Zoo one of the more successful white rhino producers. Today those
born here can be found around the world in the United States, Germany,
New Zealand, and Saudi Arabia. |
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Revised:
December 2003 |