Wild dromedaries vanished nearly two thousand years ago
The one-humped dromedary is the tallest camel: males stand about 1.8–2.4 meters at the shoulder. Domesticated on the Arabian Peninsula roughly four thousand years ago, it no longer survives as a wild population, yet thrives as a desert partner that can lose over thirty percent of its water.
A narrow chest, curved neck, brown coat, and fat-filled hump at least twenty centimeters high define the look. It browses desert plants, mates mainly in the rains, and bears a single calf after a long gestation. The name tracks Greek dromas, “runner,” via Latin and French. Males weigh roughly 400 to 690 kilograms and females 300 to 540; the hump is fat held together by fibrous tissue. Gestation lasts 15 months, and herds of about 20 are led by a dominant male and move mainly by day. English has used the name since the fourteenth century, while camel itself traces back through Latin and Greek to a Semitic root like Arabic jamal.
Aristotle already split camel kinds; modern phylogenetics places Camelus with Bactrian relatives in Camelini. Where ranges meet—Punjab, Persia, Afghanistan—crossbreeding blurs phenotypes and yields fertile hybrids. Linnaeus coined Camelus dromedarius in 1758, and in 1927 veterinarian Arnold Leese sorted dromedaries into sturdy hill camels and larger plains camels, the latter split into light riding desert types and slow, heavy-hauling riverine types. A 2007 study by Peng Cui's team dated the split between the camel and llama tribes to about 25 million years ago. Despite fertile hybrids, a 1994 genetic analysis found 10.3 percent divergence between dromedary and Bactrian sequences.
People have bred the two species together since the first millennium BC; the hybrids carry either one long lopsided hump or two unequal ones and outmuscle both parents. The oldest and smallest known camel, Protylopus, lived in Eocene North America, and later Camelus crossed the Bering Strait into Asia, Europe and Africa. A dromedary jawbone from 8,200 BC turned up on Saudi Arabia's Red Sea coast. Today domestic herds live across Africa, Arabia and the Thar desert, a feral population roams Australia, and several North African tribes depend on camel meat and milk.
Source: Dromedary
