In the Oise, tits to counter the invasion of processionary caterpillars in town. They are usually found on pines and oaks but unfortunately they seem to diversify their diet and occupy cherry trees.
Their hairs, which are highly stinging and invisible to the naked eye, fly away and can cause irritation. To avoid being confronted with this scourge, the green spaces service, renamed green heritage, decided to invite its sworn enemy: the tit, more precisely the great tit.