Actually Five Categories. We already know what the carnivora and the herbivora eat. The graminivora are animals which live mainly on grains and the seeds of grasses. This takes in mainly certain types of birds, although they may also eat insects. The omnivora are animals that thrive on a mixed diet, eating both meat and many kinds of plants.
Bears are an example.
The frugivora are animals that live mainly on fruits, nuts, tender shoots, roots and leaves of plants. Their main diet is a fruitarian one, or close to it. Man is a Frugivora. Now we come to the main question. At first glance it might seem that we belong in the omnivora category, that we eat everything.