Professional exterminators with decades on the job struggle to recall infestations as impressive — perhaps that should be repulsive — as those now forcing the closure of Paris parks, where squirmy clumps of rats brazenly feed in broad daylight, looking like they own the place. Two Japanese tourists searching for Notre Dame cathedral, also just minutes away, thankfully didn't notice the rats in bushes just in front of them when they stopped to ask for directions. The furry princes of the city were all over the park, sauntering across the footpaths, merrily grazing in the undergrowth and far more bothered by pigeons competing with them for breadcrumbs than by people walking past and the rattle and hum of the morning rush hour. Before the park was closed in November, rats foraging for food hung like grapes off the trash bins and regularly scampered through the children's play area, sowing panic, he said. Lambin suspects the infestation has been made worse by Parisians and tourists who leave food out for the pigeons and, in particular, a homeless man who swings by most mornings with bags of stale bread recovered from local eateries.