The US Environmental Protection Agency has joined PERIAMAR Cost Action as MC Observer. As the responsible agency for pesticide registration in the United States, the US EPA members involved in the COST Action PERIAMAR will participate in the design of risk assessment proposals for amphibians and reptiles, being able to apply to their framework any advances in this context resulting from PERIAMAR. In addition, as an agency actively involved in research reinforcing links with researchers from the other countries involved in PERIAMAR can be beneficial for creating critical mass and fostering future transnational collaboration. This incoporation will help us in our purpose of sharing any eventual proposal to improve the pesticide risk assessment protocols for amphibians and reptiles that can arise from PERIAMAR with non-European countries.