The quagga ( / ˈ k w ɑː x ɑː / or / ˈ k w æ ɡ ə / )    ( Equus quagga quagga ) was a plains zebra that lived in South Africa until becoming extinct late in the 19th century. It was long thought to be a distinct species, but early genetic studies have supported it being a subspecies of plains zebra. A more recent study suggested that it was merely the southernmost cline or ecotype of the species. The name was derived from its call, which sounded like "kwa-ha-ha".
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 donkra or zebra hinny and offspring of a horse sire and a zebra dam 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.