In northern Cambodia, threatened wildlife, livestock and people are being poisoned by pesticides deposited in seasonal waterholes. Addressing this critical conservation threat requires understanding the drivers of poisoning behaviours and the social contexts in which they occur. This study across 10 communities in two protected areas aimed to provide a first assessment of this phenomenon. We used the theory of planned behaviour to measure socio-psychological determinants of behaviour and deepened this understanding using informant interviews and focus group discussions. Informants reported that so-called termite poisons, including powerful carbamates, are deliberately deposited at waterholes to catch wildlife for consumption. This method is perceived to be low effort and high efficacy, and perceptions of the health risks vary. Predominant users are young men and children, but it is unclear whether the practice is related to food insecurity. Threatened wildlife species reported as affected include the giant ibis Pseudibis gigantea and vulture species. Overall, social norms are strongly negative towards poisoning; 75% of survey respondents perceived negative norms because of impacts on human and livestock health, environmental quality, and risks of legal sanctions. This has led to interventions by local authorities in half of the studied villages. We suggest that future interventions should raise the salience of negative norms by providing a non-conflictual mechanism for community members to participate in monitoring and sanctioning, such as a reporting hotline. Regulatory interventions are also required to control the supply of restricted pesticides.

Network analysis has emerged as a useful practice for characterizing governance relationships and providing insights to the power relations that affect landscapes. We applied actor network analysis in two rural Cambodian landscapes to examine decisionmaking structures that affect conservation and development systems. Using questionnaire data, we analyze structural features of networks of cooperation and exchange to identify patterns of action and processes of change. We supplement our analysis with qualitative information gathered on power and social-ecological components of landscapes to enrich our understanding of natural resource systems. We find that power in Cambodia is concentrated in a central hierarchy, and external actors aiming to influence decision making would benefit from operating at multiple scales; there is no single leverage point for interventions. Cooperation between conservation and development actors is lacking; we observe that actors tend to cluster within similar groups. Cross-sectoral collaboration may be enhanced by knowledge brokers, but current actors lack resources to fulfil this role and require external support. Our study highlights the importance of nongovernment actors as conveners and facilitators to shape natural resource governance in the context of weak institutions. We advocate more institutionalized use of diagnostics, such as actor network analysis, for enhanced natural resource governance.