Original title: I misteri della giungla nera (1965)
Also Known As: Das Geheimnis der Lederschlinge (West Germany), Geheimnis der Schlangeninsel (West Germany), Kidnapped to Mystery Island (USA), Snake Hunter Strangler, The Mystery of Thug Island, I vasilissa tou apigorevmenou nisiou (Greece), Kauhujen viidakko (Finland), The Mystery of Black Jungle
Country: Italy / Monaco / West Germany 
Director: Luigi Capuano
Cast (from DVD credits):
Guy Madison … Souyadhana
Ingeborg Schöner … Ada (as Inge Schoner)
Giacomo Rossi-Stuart … Tremal Naik (as Giacomo Rossi Stuart)
Ivan Desny … Maciadi
Giulia Rubini … Gundali
Ferdinando Poggi … Kammamuri (as Nando Poggi)
Peter van Eyck … Captain McPherson
Aldo Bufi Landi (as Aldo Bufi-Landi)
Aldo Cristiani
Romano Giomini
Enzo Fiermonte (not credited on DVD)
Has been released on DVD in Greece in the Cinecitta collection (No 8). Details of the DVD:
DVD Title: ? / Misteri della giungla nera
Region code: 2
Runtime: 1:23:51
Audio: Italian DD 2.0
Subtitles: Greek non-removable
No extras
Disc: Single-layered, dual-sided.
Notes: A Greek movie is included on the other side of the disc, no subtitles are provided.
Screenshots from the DVD
Opening credits are in non-anamorphic widescreen 2.35:1 after which the ratio changes to almost fullscreen.