To a geographical distribution of the widest extent, Diptera add a range of habits of the most diversified nature; they are both animal and vegetable feeders, an enormous number of species acting, especially in the larval state, as scavengers in consuming putrescent or decomposing matter of both kinds.
Carmen poured grain into the feeders and the smell of oats and honey brought a tidal wave of goats into the barn.
The vegetable-feeders attack leaves, herbaceous or woody stems and roots; frequently different parts of a plant are attacked in the two active stages of the life-history; the cockchafers, for example, eating leaves, and their grubs gnawing roots.
They are vegetable feeders, both in the perfect and larval stages, and are often highly injurious.
Owing to their great height these three ranges receive heavier rainfall than the surrounding country and are feeders to the northern valleys, which constitute the chief agricultural region of the state.