This is a total mess of a movie. A Spanish/French co-production, this was accredited to Jess Franco for a long time until the real culprit (a Spanish ex-actor by the name of Julio Tabacana) was revealed. However, the fact it shares cast/scenes/plot with Franco's THE CANNIBALS, which was released at a similar time, hints that his veiled hand may have been at work somewhere in the production. Other "Franco-isms" include looping stock sound track (in this case, the same bird call repeated ENDLESSLY) and long shots of characters doing absolutely nothing and wandering endlessly through the jungle.
Getting through this is an ordeal. The "natives" are clearly white in origin (possibly cast members?)- many of them have coiffured hair and beer guts, and the only thing to distinguish their cannibal nature are smatterings of paint on their flabby bodies. In some scenes they clearly can't hide their amusement at the "tribal rituals" they are involved in. Their "cannibal village" is quite obviously not in a jungle, as the lawn is neatly mowed and in some shots you can see a road in the background with vehicles parked on it. Adding insult to injury, the disembowelment scenes are all achieved by shamelessly swapping the victim's torso for that of an actual pig corpse wrapped in clothing. Seriously.
For the cannibal enthusiast only, this is painfully boring and inept. It is an insult to CANNIBAL HOLOCAUST that the films share a genre.