Instruct: Given a question, retrieve passages that can help answer the question.
Query: How tall are zebra?
The Grévy's zebra is the largest of all wild equines. It is 2.5–2.75m (8.2–9.0ft) from head to tail with a 55–75cm (22–30in) tail, and stands 1.45–1.6m (4.8–5.2ft) high at the withers. These zebras weigh 350–450kg (770–990lb).[11][12] Grévy's zebra differs from the other two zebras in its more primitive characteristics.[13]:147 It is particularly mule-like in appearance; the head is large, long, and narrow with elongated nostril openings;[13]:147 the ears are very large, rounded, and conical and the neck is short but thick.[14] The zebra's muzzle is ash-grey to black in colour with the lips having whiskers. The mane is tall and erect; juveniles have a mane that extends to the length of the back and shortens as they reach adulthood.[14]
The Cape mountain zebra ("Equus zebra zebra") is a subspecies of mountain zebra that occurs in certain mountainous regions of the Western and Eastern Cape provinces of South Africa. It is the smallest of all existing zebra species and also the most geographically restricted. Although once nearly driven to extinction, the population has now been increased by several conservation methods, and is classified as Vulnerable by the IUCN. 
The Cape mountain zebra is one of two geographically separated subspecies of the species "Equus zebra" (mountain zebra), the other being Hartmann's mountain zebra ("Equus zebra hartmannae").
The Cape mountain zebra was once was regarded as a separate species from Hartmann's mountain zebra based on taxonomic evidence, but recent genomic evidence has led to the two populations now being reclassified as subspecies of "Equus zebra".
This northern subspecies is vertically striped in front, horizontally on the back legs, and diagonally on the rump and hind flanks. Shadow stripes are absent or only poorly expressed. The stripes, as well as the inner spaces, are broad and well defined. Northerly specimens may lack a mane. Grant’s zebras grow to be about tall, and generally weigh about . The zebras live in family groups of up to 18 zebras, and they are led by a single stallion. Grant’s zebras typically live 20 years.
The Grévy's zebra (Equus grevyi), also known as the imperial zebra, is the largest living wild equid and the largest and most threatened of the three species of zebra, the other two being the plains zebra and the mountain zebra. Named after Jules Grévy, it is the sole extant member of the subgenus Dolichohippus. Grévy's zebra is found in Kenya and Ethiopia. Compared with other zebras, it is tall, has large ears, and its stripes are narrower.
"Why Zebras Don't Get Ulcers" explains how social phenomena such as child abuse and the chronic stress of poverty affect biological stress, leading to increased risk of disease and disability.
To develop the Vial Plan, a group young and creative people had the idea to show the zebra crossing, with a character that would represent a Zebra: a two pieces costume that emulates the animal. In a playful way they could make people notice that there is a space for them to exercise their rights as citizens and to walk safely through the streets. That’s how they realized that there was a great amount of citizens of La Paz that didn’t know there was a zebra crossing or what was it for. For this initiative they invited young people that worked polishing shoes or selling candies on the streets to play this curious character.
The Grévy's zebra was first described by French naturalist Émile Oustalet in 1882. He named it after Jules Grévy, then president of France, who, in the 1880s, was given one by the government of Abyssinia. Traditionally, this species was classified in the subgenus Dolichohippus with plains zebra and mountain zebra in Hippotigris. Fossils of zebra-like equids have been found throughout Africa and Asia in the Pliocene and Pleistocene deposits.[5] Notable examples include E. sanmeniensis from China, E. cautleyi from India, E. valeriani from central Asia and E. oldowayensis from East Africa.[5] The latter, in particular is very similar to the Grévy's zebra and may have been its ancestor.[5] The modern Grévy's zebra arose in the early Pleistocene.[5] Zebras appear to be a monophyletic lineage[6][7][8] and recent (2013) phylogenies have placed Grevy's zebra in a sister taxon with the plains zebra.[6] In areas where Grévy's zebras are sympatric with plains zebras, the two may gather in same herds[9] and fertile hybrids do occur.[10]
Rothschild was tall, suffered from a speech impediment and was very shy, but he had his photograph taken riding on a giant tortoise and drove a carriage harnessed to four zebras to Buckingham Palace to prove that zebras could be tamed.
Zebras have been the subject of African folk tales which tell how they got their stripes. According to a San folk tale of Namibia, the zebra was once all white, but acquired its black stripes after a fight with a baboon over a waterhole. After kicking the baboon so hard, the zebra lost his balance and tripped over a fire, and the fire sticks left scorch marks all over his white coat. In the film "Fantasia", two centaurs are depicted being half human and half zebra, instead of the typical half human and half horse.
Zebras are a popular subject in art. The fourth Mughal emperor Jahangir (r.1605–24), commissioned a painting of the zebra, which was completed by Ustad Mansur. Zebra stripes are also a popular style for furniture, carpets and fashion.
The striping pattern of the zebra is unique among sympatric ungulates. One suggested function for the stripes is to provide crypsis for the animal in tall grass or in the dappled shade beneath bushes and trees. However, cryptically coloured species, such as the kudu and bushbuck, tend to be quiet and stealthy. They freeze during danger and flee only at the last moment. By contrast, the zebra is active and noisy, and makes no attempt to hide itself. Another suggestion is motion camouflage, that the stripes affect a predator's judgement of the zebra's size, distance, and what direction it is going. A 2014 study supports this hypothesis, finding that, when moving, the stripes may confuse observers, such as mammalian predators and biting insects, via two visual illusions, the wagon wheel effect, where the perceived motion is inverted, and the barber pole illusion, where the perceived motion is in a wrong direction. A related hypothesis is that the stripes make it difficult for a predator to single out and learn about an individual during a chase.
In 2004, C. P. Groves and C. H. Bell investigated the taxonomy of the zebras (genus "Equus", subgenus "Hippotigris"). They concluded that the mountain zebra ("Equus zebra zebra") and Hartmann's mountain zebra ("Equus zebra hartmannea") are distinct, and suggested that the two would be better classified as separate species, "Equus zebra" and "Equus hartmannae".
You take your son to the zoo, see several zebras, and, when questioned by your son, tell him they are zebras. Do you know they are zebras? Well, most of us would have little hesitation saying that we did know this. We know what zebras look like, and, besides, this is the city zoo and the animals are in a pen clearly marked "Zebras." Yet, something's being a zebra implies that it is not a mule and, in particular, not a mule cleverly disguised by the zoo authorities to look like a zebra. Do you know that these animals are not mules cleverly disguised by the zoo authorities to look like zebras?
Crawshay's zebra ("Equus quagga crawshayi") is a subspecies of the plains zebra native to eastern Zambia, east of the Luangwa River, Malawi, southeastern Tanzania, and northern Mozambique south to the Gorongoza District. Crawshay's zebras can be distinguished from other subspecies of plains zebras in that its lower incisors lack an infundibulum. Crawshay's zebra has very narrow stripes compared to other forms of the plains zebra.
Zebra Media Access Control (Z-MAC) is a network protocol for wireless sensor networks. It controls how a Media Access Control (MAC) accesses a common communication medium of a network.
The plains zebra ("Equus quagga", formerly "Equus burchelli") is the most common, and has or had about six subspecies distributed across much of southern and eastern Africa. It, or particular subspecies of it, have also been known as the common zebra, the dauw, Burchell's zebra (actually the subspecies "Equus quagga burchellii"), Chapman's zebra, Wahlberg's zebra, Selous' zebra, Grant's zebra, Boehm's zebra and the quagga (another extinct subspecies, "Equus quagga quagga").
The offspring of a zebra-donkey cross is called a zonkey, zebroid, zebrass, or zedonk; "zebra mule" is an older term, but still used in some regions today. The foregoing terms generally refer to hybrids produced by breeding a male zebra to a female donkey. "Zebra hinny, zebret" and "zebrinny" all refer to the cross of a female zebra with a male donkey. Zebrinnies are rarer than zedonkies because female zebras in captivity are most valuable when used to produce full-blooded zebras. There are not enough female zebras breeding in captivity to spare them for hybridizing; there is no such limitation on the number of female donkeys breeding.
There are three species of zebras: the plains zebra, the mountain zebra and the Grévy's zebra. The plains zebra and the mountain zebra belong to the subgenus "Hippotigris", while Grévy's zebra is the sole species of subgenus "Dolichohippus". The latter resembles an ass, to which zebras are closely related, while the former two look more horse-like. All three belong to the genus "Equus", along with other living equids.
Although zebra species may have overlapping ranges, they do not interbreed. In captivity, plains zebras have been crossed with mountain zebras. The hybrid foals lacked a dewlap and resembled the plains zebra apart from their larger ears and their hindquarters pattern. Attempts to breed a Grévy's zebra stallion to mountain zebra mares resulted in a high rate of miscarriage. In captivity, crosses between zebras and other (non-zebra) equines have produced several distinct hybrids, including the zebroid, zeedonk, zony, and zorse. In certain regions of Kenya, plains zebras and Grévy's zebra coexist, and fertile hybrids occur.
Chapman's zebra is distinguished by stripes similar to the Burchell's zebra and on the lower halves of the legs, which break up into many irregular brown spots. The pastern is not completely black on the lower half. When foals are born, they have brown stripes, and in some cases, adults do not develop the black colouration on their hides and keep their brown stripes. Males usually weigh pounds and stand at tall. Females weigh about and stand as tall as the males.
The mountain zebra has a dewlap, which is more conspicuous in "E. z. zebra" than in "E. z. hartmannae". Like all extant zebras, mountain zebras are boldly striped in black or dark brown, and no two individuals look exactly alike. The whole body is striped except for the belly. In the Cape mountain zebra, the ground colour is effectively white, but the ground colour in Hartmann's zebra is slightly buff.
By 2025, fifteen years after the events of "Zebraman", Tokyo has renamed itself Zebra City, and has instituted a "Zebra Time" starting at 5:00 AM/PM for 5 minutes (in which all crime is legal) the government allows the Zebra Police to attack any and all presumed criminals. One Zebra Time results in the attempted murder of Shinichi Ichikawa, also known as Zebraman. Surviving the attack but having lost his memories, he must team up with television's fake Zebraman and a young protégé to save a mysterious little girl from Zebra Queen and her Zebra Police, and then the world from Zebra Queen's ultimate plan to use the strange aliens from 2010 to bring Zebra Time to the whole world.For the film, Riisa Naka as the Zebra Queen released a single titled on April 21, 2010, to serve as the film's theme song. A music video was also released featuring Naka in the character of Zebra Queen singing the song. A music video was also recorded for the other song included on the single, , which is also used in the film's trailers. For the music videos and all performances of the song, Zebra Queen has a Lady Gaga-like persona.
The scientists aboard the Namao monitored the presence of zebra mussels as they became established, studied the environmental impacts of zebra mussels in the lake including the decline of native mussel populations, researched how they became introduced, and helped create and conduct control operations.
A zebroid is the offspring of any cross between a zebra and any other equine: essentially, a zebra hybrid. In most cases, the sire is a zebra stallion. Offspring of a donkey sire and zebra dam, called a zebra hinny, or donkra, and offspring of a male horse and a female zebra called a hebra do exist, but are rare and are usually sterile and infertile. Zebroids have been bred since the 19th century. Charles Darwin noted several zebra hybrids in his works.
The term is also used for tables with every other row colored to make it easier to read tables. Although Zebra striping has been used for a long time to improve readability, there is relatively little data on how much it helps.
The zebra turkeyfish is an unusual looking fish with vertical stripes in orange, white and black on the body, and large, banded fan-like pectoral fins that flare out on either side as the fish lies on the seabed. The front dorsal fin is made up of thirteen tall, quill-like spines and the second dorsal fin has ten to eleven soft rays. The anal fin has three spines and about ten soft rays. The second dorsal fin, the anal fin and the rounded caudal fin are transversely banded in black and white. This fish grows to a maximum length of about .