The Nutcracker's call is a sharp, harsh rolling cry that carries far through the forest.
Alarm call: a hard, repeated “krrr-krrr-krrr” — harsh and rolling, it can recall a woodpecker but is drier. Often heard when the bird is disturbed at a cache.
Contact call: a softer “krra-krra” used within a pair or in family groups.
Juvenile begging call: a persistent shrill cry during the weeks when they are still being fed by the parents.
The call is heard most during the breeding preparations in January–February and during the autumn nut-caching period in September–October. Recordings can be found on xeno-canto and the taxon page of Artportalen (the Swedish species observation system).