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Why Zebras Don't Get Ulcers is a 1994 (2nd ed. 1998, 3rd ed. 2004) book by Stanford University biologist Robert M. Sapolsky. The book includes the subtitle "A Guide to Stress, Stress-related Diseases, and Coping" on the front cover of its third edition.
The plains zebra is the national animal of the Republic of Botswana and its stripes are depicted on the country's flag. The flag stripes also represent racial harmony in the country. [41] The zebra has also been associated with beauty and the women of various societies would paint much of their bodies in stripes.
A 2013 phylogenetic study found that the plains zebra is more closely related to Grévy's zebras than mountain zebras. [14] The extinct quagga was originally classified as a distinct species. [ 15 ] Later genetic studies have placed it as the same species as the plains zebra, either a subspecies or just the southernmost population.
Grévy's zebra is the largest wild species, standing up to 13.2 hands (54 inches, 137 cm) and weighing up to 405 kg (890 lb). [33] Domesticated horses have a wider range of sizes. Heavy or draft horses are usually at least 16 hands (64 inches, 163 cm) high and can be as tall as 18 hands (72 inches, 183 cm) and weigh from about 700 to 1,000 kg ...
Heliconius charithonia, the zebra longwing or zebra heliconian, is a species of butterfly belonging to the subfamily Heliconiinae of the family Nymphalidae. [2] [3] It was first described by Carl Linnaeus in his 1767 12th edition of Systema Naturae. The boldly striped black and white wing pattern is aposematic, warning off predators.
Equidae (commonly known as the horse family) is the taxonomic family of horses and related animals, including the extant horses, asses, and zebras, and many other species known only from fossils. The family evolved more than 50 million years ago, in the Eocene epoch, from a small, multi-toed ungulate into larger, single
The enigmatic dinoceratans were among the first large herbivorous mammals, although their exact relationship with other mammals is still debated with one of the theories being that they might just be distant relatives to living ungulates; the most recent study recovers them as within the true ungulate assemblage, closest to Carodnia.
Grévy's zebra (Equus grevyi), also known as the imperial zebra, is the largest living wild equid and the most threatened of the three species of zebra, the other two being the plains zebra and the mountain zebra. Named after French president Jules Grévy, it is found in parts of Kenya and Ethiopia.