An extremely low budget -- shot on an obvious studio set and featuring cheap and grainy stock footage -- only adds to the hilarity in this 1970 entry in the "Carry On" series. Series stalwarts Sidney James and Joan Sims star, as the gang head deep into the Amazon in search of an endangered species of bird. There they must contend with a tribe of Amazons and a horny gorilla. As if that weren't enough, they find themselves pursued by ravenous headhunters who must have seen all the "Carry On" troupe's routines one too many times. ~ Paul Brenner, Rovi