Movatterモバイル変換


[0]ホーム

URL:


Jump to content
WikipediaThe Free Encyclopedia
Search

Giraffe

From Simple English Wikipedia, the free encyclopedia

Giraffe
Scientific classification
Kingdom:
Class:
Order:
Family:
Genus:
Giraffa
Binomial name
Giraffa camelopardalis
Range map

Agiraffe (Giraffa camelopardalis) is amammal which lives inAfrica. Giraffes have aneven number of toes and are the tallest land animals. Giraffes andOkapi are the familyGiraffidae, and are the only extant giraffids.[1]

Appearance

[change |change source]

Giraffes have a very longneck and longlegs. Giraffes are the tallest land animals on Earth, with necks that can be up to 2-2.4 m (6.6-7.9 ft) in length.[2][3][4] Fully grown giraffes stand4.3–5.7 m (14.1–18.7 ft) tall, with males taller than females.[2][3][5] The tallest recorded male was5.88 m (19.3 ft) and the tallest recorded female was5.17 m (17.0 ft) tall.[5][6] The average weight is1,192 kg (2,628 lb) for an adult male and828 kg (1,825 lb) for an adult female.[7] Maximum weights of1,930 kg (4,250 lb) and having been recorded for males and females, respectively.[2][3] They have a long blacktongue, up to 45 cm in length.[2][3] This they use to wrap around leaves and pull them off trees.

Theirfur has a light yellowish tan or off-whitecolour with brown or russet patches. No two giraffes have the same pattern. The differentsub-species have different coat patterns. Both male and female giraffes have smallhorn-like stumps on their head, which are covered withskin. The horns are called ossicones. These come from the cartilage displaced from their skull as it develops. These are fur-covered bumps on their skulls, unlike the horns of other animals.

Habitat

[change |change source]

Giraffes are found in parts of Africa. They live on the savannah, which is the Africangrassland, or in light woodland. They do not live in thick forests where it is difficult to see predators (such as lions) approaching.The temperature is normally around 70 degrees. Most giraffes live either in East Africa or inAngola andZambia in southwestern Africa.

Life

[change |change source]

Giraffes eat mostly leaves from tall trees, which they can reach because of their long legs and long necks, as well as fruit. Their rough tongue allows them to eat theacacia leaves protected by thorns. They can go without water for weeks. Like all mammals, giraffes have only seven bones in their necks.

Giraffes live alone or in loose groups. Young male giraffes foa single baby, which is called "calf". Giraffes give birth while standing, so the baby falls down 2 metres. Giraffe calfs are already 2 m tall and weigh 50–55 kg.[2][3] The calf stays with its mother for 112 years. Young giraffes become mature when they are 4 years old, and they are fully grown when they are 6 years old. Giraffes can live to 25 years old, and in captivity they can live 35 years.

Standing Giraffe at Nairobi National Park, Kenya

Giraffes use their feet to kick predators away, and mature male giraffes use their head and necks to fight for dominance at mating time. These long necks, are, in fact, used as a weapon during the male on male intra–sexual battle that is also referred to as a spar.[8] The females, who receive little to no aid from their partners in raising the calves, prefer the males that are victorious. Those with the longer and stronger necks will reproduce more frequently and keep their genes in the giraffe population for longer compared to the males with shorter, weaker necks.[9]

There are about nine differentsubspecies of giraffe, with only small differences between them. When giraffes of two different sub-species breed, the young are calledhybrids (mixed breeds). Of the nine sub-species of giraffe, only one, the Rothchild's, isendangered.

References

[change |change source]
  1. FRSSAf, G. MITCHELL; FRSSAf, J. D. Skinner (2003-01-01)."On the origin, evolution and phylogeny of giraffes Giraffa camelopardalis".Transactions of the Royal Society of South Africa.58 (1):51–73.doi:10.1080/00359190309519935.ISSN 0035-919X.S2CID 6522531.
  2. 12345Maisano, Sarah."Giraffa camelopardalis giraffe". Animaldiversity.ummz.umich.edu.
  3. 12345Owen-Smith R.N. 1988. Megaherbivores: the lnfluence of very large body size on ecology. Cambridge: Cambridge University Press.
  4. Taylor M.P. & Wedel M.J. (2013)."Why sauropods had long necks; and why giraffes have short necks".PeerJ.1: e36.doi:10.7717/peerj.36.ISSN 2167-8359.PMC 3628838.PMID 23638372.
  5. 12Nowak, Ronald M.; Walker, Ernest Pillsbury (1999).Walker's Mammals of the World. JHU Press. pp. 1086–1089.ISBN 978-0-8018-5789-8.
  6. Dagg A.I. and J.B. Foster (1976/1982): The Giraffe: its biology, behavior, and ecology. Krieger , Malabar, Florida.
  7. Skinner, J.D.; Chimimba, Christian T. (1990).The mammals of the southern African subregion. University of Pretoria. pp. 616–20.ISBN 978-0-521-84418-5.
  8. Nicholls, Henry."Giraffes may not have evolved long necks to reach tall trees".www.bbc.com. Retrieved2020-11-12.
  9. Williams, Edgar M. (2016-09-12)."Giraffe Stature and Neck Elongation: Vigilance as an Evolutionary Mechanism".Biology.5 (3): 35.doi:10.3390/biology5030035.ISSN 2079-7737.PMC 5037354.PMID 27626454.
Retrieved from "https://simple.wikipedia.org/w/index.php?title=Giraffe&oldid=10614333"
Categories:
Hidden categories:

[8]ページ先頭

©2009-2026 Movatter.jp