As usual these are of three categories - primary, secondary and tertiary. Herbivorus animals feeding on the leaves, tender shoots and fruits of producers are the primary consumers. These are ants, flies, beetles, locusts, leafhoppers, bugs, spiders etc., among small animals, Squirrels, Flying foxes, Mongooses etc are also primary consumers. Secondary consumers are carnivorous like snakes, birds, lizards, foxes etc. Birds may be primary consumers also. Tertiary consumers include top carnivores like lion, tiger etc. Feeding on primary and secondary consumers.