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The camels' gait and widened feet help them move without sinking into the sand. [34] [36] The kidneys and intestines of a camel are very efficient at reabsorbing water. Camels' kidneys have a 1:4 cortex to medulla ratio. [37] Thus, the medullary part of a camel's kidney occupies twice as much area as a cow's kidney.
Dromedary camels, bactrian camels, llamas, and alpacas are all induced ovulators. [8] The three Afro-Asian camel species have developed extensive adaptations to their lives in harsh, near-waterless environments. Wild populations of the Bactrian camel are even able to drink brackish water, and some herds live in nuclear test areas. [9]
The dromedary (Camelus dromedarius), also known as the dromedary camel, Arabian camel and one-humped camel, is a large camel of the genus Camelus with one hump on its back. It is the tallest of the three camel species; adult males stand 1.8–2.4 m (5 ft 11 in – 7 ft 10 in) at the shoulder, while females are 1.7–1.9 m (5 ft 7 in – 6 ft 3 in) tall.
The feet of the roe deer (Capreolus capreolus) have cloven hooves with prominent dewclaws.. The hoof (pl.: hooves) is the tip of a toe of an ungulate mammal, which is covered and strengthened with a thick and horny keratin covering. [1]
The Bactrian camel shares the genus Camelus with the dromedary (C. dromedarius) and the wild Bactrian camel (C. ferus).The Bactrian camel belongs to the family Camelidae. [1] [5] The ancient Greek philosopher Aristotle was the first European to describe the camels: in his 4th century BCE History of Animals, he identified the one-humped Arabian camel and the two-humped Bactrian camel.
When threatened, the guanaco alerts the rest of the herd with a high-pitched bleating sound, which sounds similar to a short, sharp laugh. The male usually runs behind the herd to defend them. Though typically mild-mannered, guanacos often spit when threatened, and can do so up to a distance of six feet. [27] [28]
The main method of moving is an up-and-down motion with the tail fin, called the fluke, which is used for propulsion, while the pectoral fins together with the entire tail section provide directional control. All modern cetaceans still retain their digits despite the external appearance suggesting otherwise.
Titanotylopus is an extinct genus of camel (tribe Camelini), endemic to North America from the late Hemphillian stage of the Miocene through the Irvingtonian stage of the Pleistocene. [2] It was one of the last surviving North American camels; after its extinction, only Camelops remained.