yellowhammer UK /ˈjɛl.əʊˌhæm.ə(ɹ)/US /ˈjɛl.oʊˌhæm.ɚ/ noun3 •A passerine bird, Emberiza citrinella, of western Eurasia, which is mainly yellow in colour. •(US) The northern flicker, Colaptes auratus, a woodpecker with yellow underwings and undertail and often other yellowish underparts; one of its ways of feeding is to hammer on trees to find insects (adults and larvae) to eat. •A native or resident of the American state of Alabama. formsyellowhammers