I’m lucky to have spent my childhood summers among woods, streams, meadows, and marshes, but most suburbanites have never searched for frogs’ eggs, caught fireflies in a jar, or peeked into a grassy nest of adorable baby mice. As the years pass, fewer and fewer people will long for the call of bullfrogs. Today’s children, growing up on lawns and pavements, will not even have nostalgia to guide them, and soon the animals will be not only missing but forgotten.