Which wild mammal, long absent from Paris, was observed again in the capital's cemeteries during the 2010s?

The answer

The red fox has resurfaced in several Parisian cemeteries. Large, quiet at night, planted with trees and free of traffic, they offer exactly what is missing elsewhere in the city: somewhere to den during the day and hunt undisturbed once the gates close.

This question belongs to the “The Animals of Père-Lachaise” series of the Père-Lachaise quiz: ten questions, a story behind every right answer.