Morphology points to 3 basic dietary groupings. Differences in morphology reflect adaptation to different diets. Animal matter, including invertebrates and vertebrates. Typical gut of faunivores. Folivore gut characteristics.
Frugivore guts are variable.
Faunivory and folivory are the endpoints with frugivory intermediate. Pure faunivory and pure folivory reflect the two extremes of adaptation. No mammal mixes large quantities of both animal matter and leaves in its diet without including fruit. The objection of Chivers and Hladik to the term omnivore appears to reflect a different view of the definition of the term than is used by many other authors. This will be discussed later in this section.