The macaques are trained to respond to precise whistle commands from their handlers, according to the Chinese military, leaping into action, clambering up trees to destroy nests and scare away birds, according to an account on China’s Air Force News Web site . Base commanders in the account said the monkeys have destroyed more than 180 nests, at a pace of six to eight nests per monkey per day.In the past, the soldiers used a variety of tactics to rid themselves of the birds: scarecrows, netting, firecrackers, ammunition, and even climbing into the trees to destroy nests.but nothing worked