crunk, v.

Also 6-7 crunck(e. [Cf. Icel. krúnka to croak (as a raven).]
intr. Of some birds: To utter a hoarse harsh cry.

1565-73 COOPER Thesaurus, Gruo..to crunke like a crane. 1583 STANYHURST Æneis IV. (Arb.) 111 The skrich howle..Her burial roundel dooth ruck, and cruncketh in howling. 1617 MINSHEU Ductor, To Cruncke or Crunckle like a Crane.

--The Oxford English Dictionary