Thornicroft's giraffe

Last updated

Thornicroft's giraffe
Giraffa camelopardalis thornicrofti.jpg
Thornicroft's giraffe in Mfuwe, Zambia
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Giraffidae
Genus: Giraffa
Species:
Subspecies:
G. c. thornicrofti
Trinomial name
Giraffa camelopardalis thornicrofti
Lydekker, 1911
Giraffa camelopardis distribution 2018.png
Range in purple
Synonyms

G. thornicrofti
G. tippelskirchi thornicrofti

Thornicroft's giraffe (Giraffa camelopardalis thornicrofti), also known as the Rhodesian giraffe or Luangwa giraffe, is a subspecies of giraffe. It is sometimes considered a species in its own right (as Giraffa thornicrofti) [2] or a subspecies of the Masai giraffe (as Giraffa tippelskirchi thornicrofti). [3] [4] [5] It is geographically isolated, occurring only in Zambia’s South Luangwa Valley. [6] An estimated 550 live in the wild, with no captive populations. Its lifespan is 22 years for males and 28 years for females. [7] The ecotype was originally named after Harry Scott Thornicroft, a commissioner in what was then North-Eastern Rhodesia and later Northern Rhodesia.

Contents

Description

Thornicroft's giraffes are tall with very long necks. [8] They have long, dark tongues and skin-colored horns. [9] Giraffes have a typical coat pattern, with regional differences among subspecies. The pattern consists of large, irregular shaped brown to black patches separated by white to yellow bands. [9] Male giraffes' coats darken with age, particularly the patches. The darkening of the coat has not been studied extensively enough to indicate absolute age; however, it can estimate relative age of male Thornicroft's giraffes. [7]

Range, distribution and habitat

Giraffes occur in arid and dry-savannah zones in sub-Saharan Africa, provided trees are available as a food source. Thornicroft's giraffe is endemic to Zambia. [6] Giraffes are herd animals with a flexible social system. [10]

Diet

A Thornicroft's giraffe family browsing at the South Luangwa National Park, Zambia Giraffes, South Luangwa National Park (2506433842).jpg
A Thornicroft's giraffe family browsing at the South Luangwa National Park, Zambia

Giraffes are exclusively browsers that primarily feed on leaves and shoots of trees and shrubs. They consume deciduous plants in the wet season and transition to evergreen and semi-evergreen species in the dry season, choosing flowers, fruits, and pods when they are available. They are true ruminants with forestomach fermentation. Their food intake is approximately 2.1% of the body mass of females and 1.6% for males. They can obtain their water through the foliage they consume, but drink regularly when water is available. Giraffes seek out acacia species when browsing. Their feeding stimulates shoot production of the species. [11]

Reproduction

Thornicroft's giraffes breed throughout the year. They reach sexual maturity at approximately six years, and then produce offspring approximately every 677 days. About half of all calves die before one year of age, mostly due to predation. Giraffes[ which? ] can become pregnant while lactating, an unusual characteristic. [12]

Conservation

Giraffa camelopardalis thornicrofti is endemic to Zambia with a population of less than 550. There are none in captivity. Ecotourism has played a vital role in conservation of all subspecies of giraffes, due to their popularity with tourists. Giraffes as a species are classified as vulnerable according to the IUCN, but their populations are rapidly declining, with some subspecies being listed as critically endangered [13] Their primary threats are poaching, human population growth, habitat loss, habitat fragmentation, and habitat degradation. [14]

Related Research Articles

<span class="mw-page-title-main">Giraffe</span> Tall African ungulate

The giraffe is a large African hoofed mammal belonging to the genus Giraffa. It is the tallest living terrestrial animal and the largest ruminant on Earth. Traditionally, giraffes have been thought of as one species, Giraffa camelopardalis, with nine subspecies. Most recently, researchers proposed dividing them into up to eight extant species due to new research into their mitochondrial and nuclear DNA, as well as morphological measurements. Seven other extinct species of Giraffa are known from the fossil record.

<span class="mw-page-title-main">Giraffidae</span> Family of mammals belonging to even-toed ungulates

The Giraffidae are a family of ruminant artiodactyl mammals that share a common ancestor with deer and bovids. This family, once a diverse group spread throughout Eurasia and Africa, presently comprises only two extant genera, the giraffe and the okapi. Both are confined to sub-Saharan Africa: the giraffe to the open savannas, and the okapi to the dense rainforest of the Congo. The two genera look very different on first sight, but share a number of common features, including a long, dark-coloured tongue, lobed canine teeth, and horns covered in skin, called ossicones.

<span class="mw-page-title-main">Sitatunga</span> Species of swamp-dwelling antelope

The sitatunga or marshbuck is a swamp-dwelling medium-sized antelope found throughout central Africa, centering on the Democratic Republic of the Congo, the Republic of the Congo, Cameroon, parts of Southern Sudan, Equatorial Guinea, Burundi, Ghana, Botswana, Rwanda, Zambia, Gabon, the Central African Republic, Tanzania, Uganda and Kenya. The sitatunga is mostly confined to swampy and marshy habitats. Here they occur in tall and dense vegetation as well as seasonal swamps, marshy clearings in forests, riparian thickets and mangrove swamps.

<span class="mw-page-title-main">Sable antelope</span> Species of mammal

The sable antelope is a large antelope which inhabits wooded savanna in East and Southern Africa, from the south of Kenya to South Africa, with a separated population in Angola.

<span class="mw-page-title-main">Puku</span> Species of antelope

The puku is a medium-sized antelope found in wet grasslands in southern Democratic Republic of Congo, Namibia, Tanzania, Zambia and more concentrated in the Okavango Delta in Botswana. Nearly one-third of all puku are found in protected areas, zoos, and national parks due to their diminishing habitat.

<span class="mw-page-title-main">Masai giraffe</span> Species of giraffe

The Masai giraffe, also spelled Maasai giraffe, and sometimes called the Kilimanjaro giraffe, is a species or subspecies of giraffe. It is native to East Africa. The Masai giraffe can be found in central and southern Kenya and in Tanzania. It has distinctive jagged, irregular leaf-like blotches that extend from the hooves to its head. The Masai giraffe is currently the national animal of Tanzania.

<span class="mw-page-title-main">Northern giraffe</span> Proposed species of giraffe

The northern giraffe, also known as three-horned giraffe, is the type species of giraffe, G. camelopardalis, and is native to North Africa, although alternative taxonomic hypotheses have proposed the northern giraffe as a separate species.

<span class="mw-page-title-main">South Luangwa National Park</span> National park in Zambia

South Luangwa National Park is in eastern Zambia, the southernmost of three national parks in the valley of the Luangwa River. It is a world-renowned wildlife haven which is known to locals simply as "the South Park." Concentrations of game along the meandering Luangwa River and its lagoons are amongst the most intense in Africa. The river teems with hippo and crocodile and provides a lifeline for one of the greatest diversities of habitat and wildlife, supporting more than 60 species of mammals and over 400 species of birds. It marks the end of the Great Rift Valley.

<span class="mw-page-title-main">Rothschild's giraffe</span> Subspecies of Giraffe

Rothschild's giraffe is a subspecies of the Northern giraffe. It is one of the most endangered distinct populations of giraffe, with 1,399 mature individuals estimated in the wild in 2018.

<span class="mw-page-title-main">Wildlife of Zambia</span>

The wildlife of Zambia refers to the natural flora and fauna of Zambia. This article provides an overview, and outline of the main wildlife areas or regions, and compact lists of animals focusing on prevalence and distribution in the country rather than on taxonomy. More specialized articles on particular groups are linked from here.

A genetic isolate is a population of organisms with little genetic mixing with other organisms within the same species due to geographic isolation or other factors that prevent reproduction. Genetic isolates form new species through an evolutionary process known as speciation. All modern species diversity is a product of genetic isolates and evolution.

<span class="mw-page-title-main">Kordofan giraffe</span> Subspecies of giraffe

The Kordofan giraffe is a species or subspecies of giraffe found in northern Cameroon, southern Chad, the Central African Republic, and possibly western Sudan. Historically some confusion has existed over the exact range limit of this subspecies compared to the West African giraffe, with populations in e.g. northern Cameroon formerly assigned to the latter. Genetic work has also revealed that all "West African giraffe" in European zoos are in fact Kordofan giraffe. It has been suggested that the Nigerian giraffe's ancestor dispersed from East to North Africa during the Quaternary period and thereafter migrated to its current Sahel distribution in West Africa in response to the development of the Sahara desert. Compared to most other subspecies, the Kordofan giraffe is relatively small at 3.8 to 4.7 meters, with more irregular spots on the inner legs. Its English name is a reference to Kordofan in Sudan. There are around 2,300 individuals living in the wild.

<span class="mw-page-title-main">West African giraffe</span> Subspecies of giraffe

The West African giraffe, also known as the Niger giraffe is a species or subspecies of the giraffe distinguished by its light colored spots. Its last self-sustaining herd is in southwest Niger, supported by a series of refuges in Dosso Region and the tourist center at Kouré, some 80km southeast of Niamey.

<span class="mw-page-title-main">South African giraffe</span> Subspecies of southern giraffe

The South African giraffe or Cape giraffe is a species or subspecies of giraffe found in South Africa, Namibia, Botswana, Zimbabwe, Eswatini and Mozambique. It has rounded or blotched spots, some with star-like extensions on a light tan background, running down to the hooves.

<span class="mw-page-title-main">Harry Scott Thornicroft</span>

Henry Scott Thornicroft, nicknamed "Dongolosi"(16 January 1868 – 19 March 1944) was a British Native Commissioner in Petauke, in North-Western Rhodesia and later Northern Rhodesia for 17 years and later a Justice of the Peace in Fort Jameson.

<span class="mw-page-title-main">Reticulated giraffe</span> Species of giraffe

The reticulated giraffe is a species/subspecies of giraffe native to the Horn of Africa. It is differentiated from other types of giraffe by its coat, which consists of large, polygonal, block-like spots, which extend onto the lower legs, tail and face. These prominent liver-red spots also show much less white between them, when compared to other giraffe species. While the reticulated giraffe may yet still be found in parts of its historic range, such as areas of Somalia and Ethiopia, its population stronghold is primarily within Kenya. There are approximately 8,500 individuals living in the wild.

<span class="mw-page-title-main">Nubian giraffe</span> Subspecies of giraffe

The Nubian giraffe, also known as Baringo giraffe or Ugandan giraffe, is the nominate subspecies or species of giraffe. It is found in Ethiopia, Kenya, Uganda, South Sudan and Sudan. It is currently extinct in the wild of the Democratic Republic of Congo, Egypt and Eritrea. The Nubian giraffe used to be widespread in northeast Africa. The subspecies was listed as Critically Endangered by the IUCN in 2018 for the first time due to a 95% decline in the past three decades.

<span class="mw-page-title-main">Angolan giraffe</span> Subspecies of southern giraffe

The Angolan giraffe, also known as the Namibian giraffe or smokey giraffe, is a species or subspecies of giraffe that is found in northern Namibia, south-western Zambia, Botswana, western Zimbabwe and since mid-2023 again in Angola.

<span class="mw-page-title-main">Southern giraffe</span> Species of giraffe

The southern giraffe, also known as two-horned giraffe, is a species of giraffe native to Southern Africa. However, the IUCN currently recognizes only one species of giraffe with nine subspecies.

The Senegalese giraffe, or just the Senegal giraffe, is a partially disputed, extinct subspecies of the West African giraffe that was native to parts of Senegal and surrounding areas up until the 1970s.

References

  1. Bercovitch, F.; Carter, K.; Fennessy, J.; Tutchings, A. (2018). "Thornicroft's Giraffe". IUCN Red List of Threatened Species . 2018. Retrieved 10 May 2021.
  2. Groves, Colin P. (2011). Ungulate taxonomy. Peter Grubb. Baltimore, Md.: Johns Hopkins University Press. ISBN   978-1-4214-0329-8. OCLC   1202771597.
  3. Fennessy, Julian; Bidon, Tobias; Reuss, Friederike; Kumar, Vikas; Elkan, Paul; Nilsson, Maria A.; Vamberger, Melita; Fritz, Uwe; Janke, Axel (2016). "Multi-locus Analyses Reveal Four Giraffe Species Instead of One". Current Biology. 26 (18): 2543–2549. doi: 10.1016/j.cub.2016.07.036 . PMID   27618261. S2CID   3991170.
  4. Petzold, Alice; Hassanin, Alexandre (2020-02-13). Joger, Ulrich (ed.). "A comparative approach for species delimitation based on multiple methods of multi-locus DNA sequence analysis: A case study of the genus Giraffa (Mammalia, Cetartiodactyla)". PLOS ONE. 15 (2): e0217956. doi: 10.1371/journal.pone.0217956 . ISSN   1932-6203. PMC   7018015 . PMID   32053589.
  5. Coimbra, Raphael T.F.; Winter, Sven; Kumar, Vikas; Koepfli, Klaus-Peter; Gooley, Rebecca M.; Dobrynin, Pavel; Fennessy, Julian; Janke, Axel (2021). "Whole-genome analysis of giraffe supports four distinct species" (PDF). Current Biology. 31 (13): 2929–2938.e5. doi: 10.1016/j.cub.2021.04.033 . PMID   33957077. S2CID   233983230.
  6. 1 2 Fennessy, Julian, et al. "Mitochondrial DNA analyses show that Zambia's South Luangwa Valley giraffe (Giraffa camelopardalis thornicrofti) are genetically isolated." African Journal of Ecology 51.4 (2013): 635–640.
  7. 1 2 Berry, P. S. M., and F. B. Bercovitch. "Darkening coat colour reveals life history and life expectancy of male Thornicroft's giraffes." Journal of Zoology 287.3 (2012): 157–160.
  8. Wilson, and Reeder. "Giraffa camelopardalis thornicrofti." Mammal Species of the World. Bucknell University, n.d. Web. 2 May 2014.
  9. 1 2 Hassanin, Alexandre, et al. "Mitochondrial DNA variability in Giraffa camelopardalis: consequences for taxonomy, phylogeography and conservation of giraffes in West and central Africa." Comptes Rendus Biologies 330.3 (2007): 265–274.
  10. Bercovitch, Fred B., and Philip SM Berry. "Ecological determinants of herd size in the Thornicroft’s giraffe of Zambia." African Journal of Ecology 48.4 (2010): 962-971.
  11. Owen-Smith, R. Norman. Megaherbivores: the influence of very large body size on ecology. Cambridge University Press, 1992.
  12. Bercovitch, Fred B., and Philip SM Berry. "Reproductive life history of Thornicroft’s giraffe in Zambia." African journal of ecology 48.2 (2010): 535–538.
  13. Fennessy, J. & Brown, D. 2010. Giraffa camelopardalis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 02 May 2014.
  14. "Giraffe – The Facts”. Giraffe Conservation Foundation. Retrieved 2010-12-21.