Marcos Rodríguez Pantoja, right, in Madrid in 2010 at the premiere of “Among Wolves,” a film based on his life, with Juan José Ballesta, left, and Manuel Camacho, the actors who played him as an adult and child.

A wild wolf in West Jutland, Denmark, last year. The return of the animals to a country with few predators has recently come under scrutiny after a wolf was spotted near a small town, apparently unafraid of people.