The basic mammalian body type is quadruped, and most mammals use their four extremities for terrestrial locomotion; but in some, the extremities are adapted for life at sea, in the air, in trees, underground, or on two legs. Mammals range in size from the 30–40 mm (1.2–1.6 in) bumblebee bat to the 30 m (98 ft) blue whale—possibly the largest animal to have ever lived. Maximum lifespan varies from two years for the shrew to 211 years for the bowhead whale. All modern mammals give birth to live young, except the five species of monotremes, which are egg-laying mammals. The most species-rich group of mammals, the infraclass called placentals, have a placenta, which enables the feeding of the fetus during gestation.
Domestication of many types of mammals by humans played a major role in the Neolithic Revolution, and resulted in farming replacing hunting and gathering as the primary source of food for humans. This led to a major restructuring of human societies from nomadic to sedentary, with more co-operation among larger and larger groups, and ultimately the development of the first civilizations. Domesticated mammals provided, and continue to provide, power for transport and agriculture, as well as food (meat and dairy products), fur, and leather. Mammals are also hunted and raced for sport, kept as pets and working animals of various types, and are used as model organisms in science. Mammals have been depicted in art since Paleolithic times, and appear in literature, film, mythology, and religion. Decline in numbers and extinction of many mammals is primarily driven by human poaching and habitat destruction, primarily deforestation. (Full article...)
The Arabian horse is a breed of horse with a reputation for intelligence, spirit, and stamina. With a distinctive head shape and high tail carriage, the Arabian is one of the most easily recognizable horse breeds in the world. It is one of the oldest horse breeds, with archaeological evidence of horses that resemble modern Arabians dating back 4,500 years. Throughout history, Arabian horses from the Middle East spread around the world by both war and trade, used to improve other breeds by adding speed, refinement, endurance, and good bone. Today, Arabian bloodlines are found in almost every modern breed of riding horse. The Arabian developed in a desert climate and was prized by the nomadic Bedouin people, often being brought inside the family tent for shelter and protection. This close relationship with humans has created a horse breed that is good-natured, quick to learn, and willing to please. But the Arabian also developed the high spirit and alertness needed in a horse used for raiding and war. This combination of willingness and sensitivity requires modern Arabian horse owners to handle their horses with competence and respect. "The Versatile Arabian" is a slogan of the breed. Arabians dominate the discipline of endurance riding, and compete today in many other fields of equestrian activity. They are one of the top ten most popular horse breeds in the world. Arabian horses are now found worldwide, including the United States and Canada, the United Kingdom, Australia, continental Europe, South America (especially Brazil), and its land of origin, the Middle East.
...from its discovery by John Edward Gray in 1850 until a re-assessment in 1981, the Clymene Dolphin was regarded as sub-species of the Spinner Dolphin.
...the Australian Snubfin Dolphin (Orcaella heinsohni) is a recently recognised species of dolphin first described in 2005.
Drymoreomys is a genus of South American rodent represented by a single species, D. albimaculatus. First formally described in 2011, the species prefers dense, moist, montane and premontane forest. Morphological evidence suggests they are tree dwellers.
The jaw of Ambondro mahabo, seen in lingual view (from the side of the tongue). The scale bar is 1 mm (0.039 in) long. This mammal species is known only from this fragmentary lower jaw with three teeth, interpreted as the last premolar and the first two molars. It is the oldest known mammal with putatively tribosphenic teeth.
A male lion (Panthera leo) lying down in Namibia. One of the four "big cats" in the genusPanthera, the lion is the second largest cat, after the tiger. Males weigh between 150-250 kg (330-550 lb), and are easily recognizable by their manes. Though they were once found throughout much of Africa, Asia and Europe, lions presently exist in the wild only in Africa and India.
A female impala (Aepyceros melampus) photographed at Mikumi National Park, Tanzania. These medium-sized Africanantelopes inhabit savanna grasslands and woodlands close to water sources, feeding on grasses, forbs, monocots, dicots and foliage. They are fast runners and known for their leaping ability, reaching heights up to 3 m (10 ft).
Off the coast of Juneau, Alaska, a group of 15 Humpback Whales works in tandem to catch herring using the bubble net feeding technique, in which they exhale through their blowholes, creating a ring of bubbles up to 30 m (100 ft) in diameter. The whales then suddenly swim upwards through the bubble net swallowing thousands of fish in each gulp.
The Cape ground squirrel (Xerus inauris) is a medium-sized rodent native to South Africa, Namibia and Botswana. They live in social groups of up to three adult females and several sub-adults. The species mainly inhabits arid or semi-arid areas, preferring velds and grasslands with compact soil, and can also be found in scrub, on floodplains and in agricultural areas. Males live independently, only joining groups when there is a female in estrus. Ever alert to danger, they can drive off predators such as snakes by engaging in mobbing behavior.
This picture shows two Cape ground squirrels photographed in the Namib desert near Solitaire, Namibia.
The proboscis monkey (Nasalis larvatus) is endemic to the island of Borneo, where it is found predominantly in coastal areas, near rivers and in swamp forests. It is perhaps the most aquatic of the primates and is a fairly good swimmer, capable of swimming underwater; apart from this, it is largely arboreal. This image is a composite of three photographs and shows a proboscis monkey jumping between trees in Labuk Bay in the Malaysian state of Sabah.
A female koala (Phascolarctos cinereus) with her joey clinging to her back. At birth the joey is hairless, blind, and earless, and only about 20 mm (0.79 in) long. It remains hidden in the pouch for about six months, feeding only on milk. During this time it will grow ears, eyes, and fur. The joey will remain with its mother for another six months or so, riding on her back, and feeding on both milk and eucalypt leaves until weaning is complete at about 12 months of age.
The head of a Rothschild's Giraffe (Giraffa camelopardalis rothschildi), a subspecies of giraffe found in Uganda and north-central Kenya. It has deep brown, blotched or rectangular spots with poorly defined cream lines and its hocks may be spotted.
The European Rabbit (Oryctolagus cuniculus) is a species of rabbit native to the Iberian Peninsula and Northwest Africa. It has been widely introduced to countries on all continents with the exception of Antarctica and Sub-Saharan Africa, often with devastating effects on local biodiversity. In Australia particularly, twelve pairs of rabbits introduced in 1859 became millions in just ten years, the fastest spread ever recorded of any mammal anywhere in the world.
A female proboscis monkey (Nasalis larvatus) at Labuk Bay, Sabah, Malaysia. This monkey is endemic to Borneo. Though the female has a large nose, it is smaller than that of the male.
The impala (Aepyceros melampus) is a medium-sized African antelope. The name comes from the Zulu language. They are normally reddish-brown, with lighter flanks, white underbellies, and a characteristic "M" marking on the rear. Males have lyre-shaped horns, which can reach up to 90 cm (35 in) in length. They are strong jumpers, able to reach distances more than 10 m (33 ft) in a single bound. They are also fast runners, capable of reaching speeds up to 90 km/h (56 mph).
A dromedary or one-humped camel (Camelus dromedarius) in the Australian Outback. Estimated populations of Australian feral camels are in the hundreds of thousands, and this is now the world's only population of dromedaries exhibiting wild behaviour. Thousands of camels were imported into Australia between 1840 and 1907 to open up the arid areas of central and western Australia. They were used for riding, and as draught and pack animals for exploration and construction of rail and telegraph lines; they were also used to supply goods to remote mines and settlements. Their impact on the environment is not as bad as that of other introduced pests in Australia. They prefer to eat trees and plants that local wildlife dislike; only 2% of their diet is grass.
A portrait of a male impala, showing its horns. Horns consist of bone cores surrounded by a covering of keratin and other proteins, and are often curved or spiral in shape. Most horned animal species have one pair, though some may have more.
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