Krolik Po Berlinsku(2009) -

The wall kept out humans and natural predators, and the guards actually protected the animals from disturbance.

For 28 years, a population of wild rabbits lived in the "Death Zone"—the grassy no-man’s-land between the inner and outer layers of the Berlin Wall. Krolik po berlinsku(2009)

When the Wall fell in 1989, the rabbits' comfortable, enclosed system vanished overnight. The wall kept out humans and natural predators,