Speciesism is discrimination in favor of one species, typically the human species, over others, typically in the context of exploitation or mistreatment of nonhuman animals.
Animal Ethics (2017) Speciesism, Animal Ethics, September.
MacAskill, Will & Darius Meissner (2020) Speciesism: Expanding the moral circle across species, in 'Utilitarianism and practical ethics', Utilitarianism.
Singer, Peter (2002) All animals are equal..., in Animal Liberation, New York: HarperCollins, pp. 1-23.