What Animal Looks Like A Donkey Zebra
Zebra-donkey Hybrids
Zonkeys
Mammalian Hybrids
EUGENE M. MCCARTHY, PHD GENETICS, ΦΒΚ
A diligent scholar is like a bee who takes honey from many different flowers and stores it in his hive.
—John Amos Comenius
This hybrid (Equus asinus × Equus burchelli) is known equally a zonkey (or zedonk, zebrass, zeedonk, zebradonk, zebrinny, zenkey, zebronkey, or deebra). Reports say hybrids of both sexes have produced offspring. Usually a zebra stallion is paired with a she-donkey, but the reciprocal cross is sometimes produced. For instance, in 2005, an Eastward. burchellii mare named Allison produced a zebrass called Alex sired by an ass on the island of Barbados.
Hybrids accept assuming stripes on their legs, but simply faint striping elsewhere, except at the shoulders and along the spine (where both zebras and donkeys carry stripes). Individuals with bolder body striping are probable backcrosses to zebra. In general, the stripes, even on the legs, are narrower in hybrids than in the pure zebra parent.
Grevy's zebras, with their large heads, large and rounded ears, and thick, erect manes expect more than like mules than do other zebras. Indeed, the website of the National Zoo (Washington) asserts that many experts view Grevy's zebras as striped asses, non closely related to zebras (NATZ). Z. grevyi is also geographically intermediate between asses and zebras and is capable of hybridization with both. These facts suggest Z. grevyi as a PHP of crossing between asses and zebras, simply the matter should be farther investigated.
Darwin (1868, vol. Ii, p. 42) says, "Many years ago I saw in the Zoological Gardens a curious
triple hybrid, from a bay mare, past a hybrid from a male person ass and female zebra. This animal when old had inappreciably whatever stripes; simply I was assured by the superintendent, that when young it had shoulder-stripes, and faint stripes on its flanks and legs. I mention this example more specially as an example of the stripes being much plainer during youth than in old age.
Many types of hybrids, and not just zonkeys, bear witness this sort of variation in characteristics with age, and then that when young, they resemble 1 parent with respect to a given trait, but later the other.
The Somali Wild Ass
Note that known zebra-donkey hybrids, produced in captivity, are extremely similar to the supposedly critically endangered Somali Wild Donkey (Equus africanus somaliensis), which is pictured below. Moreover, the Somali Wild Ass is a PHP of natural hybridization between zebras and donkeys considering it is geographically and morphologically intermediate between zebras and donkeys. However, the probable hybrid status of animals described as "Somali wild asses" is non widely recognized considering most biologists are not aware of the appearance of zebra-donkey hybrids, nor do they seem to be enlightened that these animals occur in a state of nature just in the region lying betwixt zebra populations (to the s) and wild donkey populations (to the due north). Judging from its slightly more than ass-like appearance, the then-called Somali Wild Donkey probably represents a backcross population produced by hybridization between first generation zebra-ass hybrids and asses. Ironically, a huge corporeality of conservation funds are being spent on the preservation of this ostensible hybrid. If this animal truly is a hybrid, then funds would be improve spent in preserving the parental populations that have crossed to produce it, specially the critically endangered African Wild Donkey (Equus africanus), the wild version of the familiar domestic donkey, of which the Somali Wild Donkey is commonly treated as a subspecies.
Like all F1 hybrids, zebra-ass hybrids receive i haploid set of chromosomes from each of its parents, one donkey set and one zebra set (Iannuzzi et al. 2017). The same sort of assay should exist applied to the Somali Wild Ass.
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Sources: Ewart 1898, 1899; Flower 1929a (p. 253); Grubb 1981; Iannuzzi, A. et al. 2017; International Zoo Yearbook 1960, 1961, 1962 (p. 232), 1968 (p. 304), 1969 (p. 232), 1971 (p. 279), 1972 (p. 332); King et al. 1966; Riley 1911 (p. 229); Treus et al. 1963; von Lehmann 1982†. Meet also The Bartlett Order's page on hybrids and the effigy in Geoffroy Saint-Hilaire and Cuvier (1824-1842, vol. 3, pl. 315).
Note: Grey (1873, p. 38) stated that a skull of a hybrid of this type was in the British Museum .
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Zonkey - Zebra x Donkey - © Macroevolution.net
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