To show favouritism toward humans has been considered a prejudice, otherwise known as 'human chauvinism', 'anthropocentrism' or 'speciesism'. Peter Singer is one philosopher in particular who holds this view. In this paper I argue that there is a lack of coherence between his ethical ideology and his actual ethical theory. Singer's ethics in crucial respects exhibits favouritism toward humans, which is something he fails to justify non-partially and plausibly. It would thus be an instance of speciesism, in a sense of (...) this term that he probably would accept. This, however, does not mean that his ethics should be rejected or is impossible to defend. (shrink)