The cougar (Puma concolor) is a large cat native to the Americas. Its range spans from the Canadian Yukon to the southern Andes in South America and is the most widespread of any large wild terrestrial mammal in the Western Hemisphere. It is an adaptable, generalist species, occurring in most American habitat types. This wide range has brought it many common names, including puma, mountain lion, catamount and panther (for the Florida sub-population). It is the second-largest cat in the New World, after the jaguar (Panthera onca). Secretive and largely solitary by nature, the cougar is properly considered both nocturnal and crepuscular, although daytime sightings do occur. Despite its size, the cougar is more closely related to smaller felines, including the domestic cat (Felis catus) than to any species of the subfamily Pantherinae.
The cougar is an ambush predator that pursues a wide variety of prey. Primary food sources are ungulates, particularly deer, but it also hunts smaller prey such as rodents. It prefers habitats with dense underbrush and rocky areas for stalking, but also lives in open areas. Cougars are territorial and live at low population densities. Individual home ranges depend on terrain, vegetation and abundance of prey. While large, it is not always the apex predator in its range, yielding prey it has killed to American black bears, grizzly bears and packs of wolves. It is reclusive and mostly avoids people. Fatal attacks on humans are rare, but increased in North America as more people entered cougar habitat and built farms.
The word cougar is borrowed from the Portuguese çuçuarana, via French; it was originally derived from the Tupi language. A current form in Brazil is suçuarana.[3] In the 17th century, Georg Marcgrave named it cuguacu ara. Marcgrave's rendering was reproduced in 1648 by his associate Willem Piso. Cuguacu ara was then adopted by John Ray in 1693.[4] In 1774, Georges-Louis Leclerc, Comte de Buffon converted cuguacu ara to cuguar, which was later modified to "cougar" in English.[5][6]
The cougar is a generalist, hypercarnivore. They prefer large mammals such as mule deer, white-tailed deer, elk, moose, mountain goat and bighorn sheep. They will opportunistically take smaller prey such as rodents, lagomorphs, smaller carnivores, birds and even domestic animals including pets.[48] The mean weight of cougar vertebrate prey increases with its body weight and is lower in areas closer to the equator. A survey of North America research found 68% of prey items were ungulates, especially deer. Only the Florida panther showed variation, often preferring feral hogs and armadillos.[32]
Aside from humans, no species preys upon mature cougars in the wild, although conflicts with other predators or scavengers occur. Of the large predators in Yellowstone National Park – the grizzly bear, the black bear, the gray wolf, and the cougar – the massive grizzly bear appears dominant, often (but not always) able to drive a gray wolf pack, an American black bear, and a cougar off their kills. One study found that grizzlies and American black bears visited 24% of cougar kills in Yellowstone and Glacier National Parks, usurping 10% of carcasses. Bears gained up to 113% and cougars lost up to 26% of their respective daily energy requirements from these encounters.[55] In Colorado and California, American black bears were found to visit 48% and 77% of kills, respectively. In general, cougars are subordinate to American black bears when it comes to kills and when bears are most active, the cats take prey more frequently and spend less time feeding on each kill. Unlike several subordinate predators from other ecosystems, cougars do not appear to take advantage of spatial or temporal refuges to avoid their competitors.[56][57]
Due to the expanding human population, cougar ranges increasingly overlap with areas inhabited by humans. Attacks on humans are very rare, as cougar prey recognition is a learned behavior and they do not generally recognize humans as prey.[85] In a 10-year study in New Mexico of wild cougars who were not habituated to humans, the animals did not exhibit threatening behavior to researchers who approached closely (median distance=18.5 m; 61 feet) except in 6% of cases; 14/16 of those were females with cubs.[86] Attacks on people, livestock, and pets may occur when a puma habituates to humans or is in a condition of severe starvation. Attacks are most frequent during late spring and summer, when juvenile cougars leave their mothers and search for new territory.[87]
umas in the southern cone of America – often called Argentine cougars by North Americans – are reputed to be extremely reluctant to attack man; in legend, they defended people against jaguars.[97] The nineteenth century naturalists Félix de Azara[98] and William Henry Hudson[99] thought that attacks on people, even children or sleeping adults, did not happen. Hudson, citing anecdotal evidence from hunters, claimed that pumas were positively inhibited from attacking people, even in self-defense. In fact, attacks on humans, although exceedingly rare, have occurred
During the early years of ranching, cougars were considered on par with wolves in destructiveness. According to figures in Texas in 1990, 86 calves (0.0006% of Texas' 13.4 million cattle and calves), 253 mohair goats, 302 mohair kids, 445 sheep (0.02% of Texas' 2 million sheep and lambs) and 562 lambs (0.04% of Texas' 1.2 million lambs) were confirmed to have been killed by cougars that year.[109][110] In Nevada in 1992, cougars were confirmed to have killed nine calves, one horse, four foals, five goats, 318 sheep, and 400 lambs. In both reports, sheep were the most frequently attacked. Some instances of surplus killing have resulted in the deaths of 20 sheep in one attack.[111] A cougar's killing bite is applied to the back of the neck, head, or throat and the cat inflicts puncture marks with its claws usually seen on the sides and underside of the prey, sometimes also shredding the prey as it holds on. Coyotes also typically bite the throat, but the work of a cougar is generally clean, while bites inflicted by coyotes and dogs leave ragged edges. The size of the tooth puncture marks also helps distinguish kills made by cougars from those made by smaller predators.