This is a set of 5 items. When you insert button batteries, they make a chirping sound. The sound is sensor-activated, and it chirps when something approaches the sensor on the chest. Only two kingfishers make sounds. The others do not make sounds because the battery compartments are corroded. The bullfinch's leg was broken, and it has been repaired. Also, it cannot stand on its own, so it needs to be fixed with the base stickers. All of them are beautiful as bird models.