What big cats live in the Amazon jungle?

Both the jaguar and the cougar are found in the Amazon.

jaguar and ocelot

Some add panther to this list, but that is a misnomer. Panthers can be one of many cats, including the jaguar, in the Panthera genus. Ocelots are in the Leopardus genus and should not be confused with the leopard, which are in the Panthera genus. Leopards are not indigenous to South America.