1. graculus — de Vaan
graculus 'jackdaw' [m. o] (Varro+) IE cognates: RuCS, ORu. grakati, Is. gracu 'to caw, croak' < PSl. *grakati; RuCS, ORu. gbrkati 'to coo\ Ru. (dial.) gorkat' < PSl. *gbrkati; OIc. kraka 'crow', krakr 'raven', OE *cracian^ cracettan 'to crow (of raven)' < pre-Gm. *grag-. Lat graculus could formally correspond with Slavic *gra-ft-, but in view of the obviously onomatopoeic character of gra-, this does not suffice to … — [de Vaan, s.v. graculus, p. 282]