Environmental education and interpretation have largely focused on individual mechanisms (e.g. cognitive processes) leading to intention and behavioural change. Less has been said about the role of the situation and communication processes between tour guides and tourists in ecotourism experiences. This paper examines the role of interpreters and individuals as jointly influencing the effectiveness of communicating conservation messages. A survey of over 1500 visitors was undertaken to ascertain the factors crucial to whether visitors received a conservation message in an ecotourism setting. The results indicate a three-tier effect: individual characteristics, specifically respondent's age, were initially important. The second tier represents the impact of conservation-related information from the tour guide/interpreter. This information acts as a stimulus to the third and most crucial tier of influence – visitor empowerment. The tertiary stage comprises a two-way communication process that influences a positive conservation message. The process involves the interpreter suggesting positive conservation action that translates into what we term “a locus of responsibility” for the visitor and subsequent higher levels of satisfaction. All of these drive effective communication of conservation message comprehension.