Amur leopard is the most dangerous big cat (calls-Mammalia). According to the international union for conservation of nature it is considered to be facing an extremely high risk of extinction in the wild. They are 32-48 kg in weight, with exceptionally large males up to 60-75 kg.

It is ranked as the second most endangered big cat. It was described as a distant subspecies of leopard native to Anatolia in Turkey. In depth studies have previously indicated that the original habitat of Anatolian leopard is very dangerous to humans specially. Their prey also consists of wild goats, wild boar, chamois and Caucasian grouse.

The Asiatic Cheetah is a critically rare endangered subspecies of the cheetah found today only in Iran and Pakistan (Blochistan). It is the third most endangered Big Cat. It lives in its vast central desert in fragmented pieces of remaining suitable habitat.

Eastern puma is the fourth most dangerous mammalian in the world. It also the second heaviest cat in the American Countries. It is also knows as cougar and most closely related to smaller felines. Its primary food sources are deer, elk and bighorn sheep, as well as domestic cattle, horses and sheep. Adult puma stand 60 to 70 cm/ all at the shoulders and length of adult puma is around 2.4 meters and 53 to 90 kilo gram in weight.

The Florida Cougar is a highly threatened representative of cougar family that lives in the low tides, plan forests and swamps of southern Florid in the United States. Its Males weigh about 169 pounds and they are territorial animals and mountain home ranges of up to 100 miles.

North African leopard with possibly a handful surviving in the wild, the North African leopard is one of the most threatened of the leopard subspecies. The leopard is an elegant and powerful endangered cat. It has well-muscled body, thick limbs and broad powerful paws. It is the sixth most endangered mammal of big cat species.

Being the largest cat in the world, the Siberian Tiger has a reputation of being a vicious Killer. The Siberian Tiger is native to Siberia. The Siberia tiger has a very large hunting territory due to lack of prey. Its diet consists of deer, wild pig and fish. The population numbers 250 in the wild, and around 400 in zoos around the world.

The South Arabian leopard is listed the eight most endangered big cat and it is also the smallest leopard subspecies. It is most closely related to African leopard. Its Jaws and legs are very strong. It is not aggressive about keeping his large hunting territory. Due to the vast population of uneducated humans, concerning the ecosystem, in some areas South Arabian leopard was exterminated.

One of the largest of the big cat, the tiger is an instantly recognizable and endangered animal. Generally however, china tigers have a reddish-orange color and black marking, the pattern of which is unique. Like other big cats, south china tigers are well adopted for hunting large prey and have short, heavily-muscled forelimbs and long, sharp, powerfull claws.

The Sumatran tigers are competent swimmers, Hunting mainly occurs at night and principal prey consists of deer, sheep, wild pigs and domestic horses. Sumatran tigers average 204 cm in length from head to tail and weight about 136 kg. The Sumatran tiger is found only on the Indonesian island. In the zoo the tigers are fed an assortment of fish, meat and poultry parts.