The tennis balls are attached to poles with a small hole cut into them, making it a perfectly ready-made shelter for the mammals, especially for nesting females.

Tennis balls are designed to be indestructible. While that may be good for your game it can be a problem our planet.

Yellow felt and a rubber core. A tennis ball seems so simple. But reality is more complicated, at least on the pro tours where manufacturers can make balls that fit into a range of specifications ...