Originally the takahe had no predators, but when People came to its habitat in New Zealand, they brought goats, which ate the vegetation and ruined the enviroment, and rats who ate the takahe's eggs. People tried to get rid of rats, which had become the takahe's main predator, by introducing weasels, but the weasels just ate more takahe as well as baby takahe. So to answer your question, rats, weasels, and man are the takahe's predators.