If diplomacy is considered an alternative to war, can the ongoing human ‘war against animals’ be replaced with diplomacy between humans and other animals? While many scholars and practitioners of diplomacy can be expected to dismiss such an idea out of hand, this essay encourages us to think more seriously and thoroughly about what it might imply to engage diplomatically with nonhuman animals. Doing so requires a somewhat unconventional conception of diplomacy, and some scholars have already done much to rethink diplomacy in suitable ways (despite the persistent anthropocentrism). Combining such work with political science scholarship on human-animal relations, indigenous peoples’ relations with animals, various notions of animal ambassadorship and the study of animal behaviour in natural settings, the essay argues that interspecies diplomacy is possible and urges scholars to further explore this and how the possibility in question can be translated into reality.