The leopard (Panthera pardus) is an Old World mammal of the Felidae family and the smallest of the four 'big cats' of the genus Panthera, along with the tiger, lion, and jaguar. Leopards that are melanistic, either all-black or very dark in coloration, are known colloquially as black panthers.
Once distributed across southern Eurasia and Africa, from Korea to South Africa and Spain, it has disappeared from much of its former range and now chiefly occurs in subsaharan Africa. There are fragmented populations in Israel, Indochina, Malaysia, and western China. Despite the loss of range and continued population declines, the cat remains a least concern species; its numbers are greater than that of the other Panthera species, all of which face more acute conservation concerns.
The species' success owes in part to its opportunistic hunting behaviour and its adaptability to a variety of habitats. The leopard consumes virtually any animal it can catch and ranges from rainforest to desert. Its ecological role resembles that of the similarly-sized cougar in the Americas. Physically, the spotted cat most closely resembles the jaguar, although it is of lighter build. The leopard and jaguar may have shared ancestry, though the leopard might be more closely related to lions.
The leopard is an agile and graceful predator. Although smaller than the other members of Panthera, the leopard is still able to take large prey given a massive skull that well utilizes powerful jaw muscles. Its body is comparatively long for a cat and its legs are short. Head and body length is between 90 and 190 cm, the tail reaches 60 to 110cm. Shoulder height is 45 to 80 cm. Males are considerably larger than females and weigh 37 to 90 kg (81 to 198 lbs) compared to 28 to 60 kg (62 to 132 lbs) for females.
One of many spotted cats, a leopard may be mistaken for a cheetah or a jaguar. The leopard has rosettes rather than cheetah's simple spots, but they lack internal spots, unlike the jaguar. The leopard is larger and less lanky than the cheetah but smaller than the jaguar. The leopard's black, irregular rosettes serve as camouflage. They are circular in East Africa but tend to be square in southern Africa. Leopards have been reported to reach 21 years of age in captivity.
A male may follow a female who catches his attention. Eventually fighting for reproductive rights can take place. Depending on the region, leopards may mate all year round (Asia and Africa) or seasonally during January to February (Manchuria and Siberia). The estrous cycle lasts about 46 days and the female usually is in heat for 6–7 days. Cubs are usually born in a litter of 2–3, but infant mortality is high and mothers are not commonly seen with more than 1–2 cubs. The pregnant females find a cave, crevice among boulders, hollow tree, or thicket to give birth and make a den. Cubs open their eyes after a period of 10 days. The fur of the young tends to be longer and thicker than that of adults. Their pelage is also more gray in color with less defined spots. Around three months the infants begin to follow the mother out on hunts. At one year of age leopard young can probably fend for themselves but they remain with the mother for 18–24 months.
