The deciduous and citrus fruit industries depend upon honeybees to pollinate flowers on fruit trees and without this pollination we would have no fruit. Bees, beetles and other insects are also essential in the pollination of most wild flowers. Insects provide food to other animals. Birds such as robins, white-eyes and warblers feed mainly on insects. Antbears and pangolins have become specialists in feeding on ants and termites.
Insects control weeds.
Leaf, wood and seed-feeding insects prevent particular plant species from taking over the land surface and becoming weeds. A plant often becomes a weed when it is introduced to a foreign country without the insects that feed on it. Entomologists return to the country of origin and find these insects and after checking that the insects do not feed on beneficial plants, they are introduced to control the weed. References van Huis, A. 1996 . The traditional use of arthropods in sub Saharan Africa.