This article outlines a “descriptive animal ethics” based on the study of people’s intuitions about particular cases, in order to determine which moral theories best comport with those intuitions. I suggest that the latter need not be unreliable since they may be endorsed as considered judgments, and that even if they were, knowing them would still provide relevant information for a complete moral theory concerned with what moral agents can do. I describe a survey in descriptive ethics, discuss the results, and introduce prospective experiments. I then set forth hypotheses and propose a dual model of moral status attribution in terms of both intrinsic and extrinsic properties. I rely on recent empirical research in psychology and experiment...