A GARDEN can be a soothing, private escape from day-to-day pressures — but sharing it with others can increase its serenity. Birds can bring a garden alive, filling it with serene sights and sounds. Yet birds, particularly native Australian birds, can be Control caterpillar problems on ornamentals with a pesticide containing Bt, spinosad, carbaryl or a pyrethroid like permethrin or bifenthrin.