panther
A black panther is the melanistic colour variant of the leopard ( Panthera pardus ) and the jaguar ( Panthera onca ). Black panthers of both species have excess black pigments , but their typical rosettes are also present. They have been documented mostly in tropical forests , with black leopards in Kenya , India , Sri Lanka , Nepal , Thailand , Peninsular Malaysia and Java , and black jaguars of the Americas in Mexico , Panama , Costa Rica , Brazil and Paraguay . Melanism is caused by a recessive allele in the leopard, and by a dominant allele in the jaguar.