The tree-lined Lungotevere, the boulevard running along the river Tiber, is particularly badly affected. Sections of it are thick with droppings, creating slip hazards for pedestrians, cyclists and motorbike riders alike. Photos published by Corriere della Sera show vehicles blanketed with guano. Pedestrians arm themselves with umbrellas or run for cover. The situation is so bad that some residents bang on pots and pans in the streets and squares to scare the birds away, just as people used to do in years gone by.