Like their jabberjay fathers, mockingjays are excellent mimics, and have the ability to memorize and repeat both bird sounds and human songs. They can perfectly copy any human tune, down to the last note. They pick up tunes quickly, and often spread them to other nearby mockingjays. However, they will only repeat songs if they enjoy the singer's voice (Katniss, her father, and Rue are such people). The Avox, Pollux enjoyed whistling to the mockingjays, as it was the only auditory communication he had achieved in a very long time.