Widely used trade codes lack taxonomic granularity The volume of international trade in wildlife commodities is immense and, in many cases, is rising ( 1 ). Although there are already wildlife trade data sources e.g., the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) Trade Database and the U.S. Fish and Wildlife Service Law Enforcement Management Information System (LEMIS), coverage of traded species or countries involved is not comprehensive. This can undermine supply-chain monitoring and fast aggregation of data to inform policy-making ( 2 ). We discuss whether widely used, but limited, international customs codes and governance might evolve to address these gaps.