Cat-birds, cuckoos and orioles are very important enemies of gypsy moth.
Already the gypsy moth in the East is being fought in this way.
Some years ago the gypsy moth and the browntail moth were introduced by accident into the New England states.
The gypsy moth, which did no great harm in its European home, was brought to this country and accidentally set free.
The gypsy moth spread with alarming rapidity and persistence.