Voice - The Bobolink's song is a loud bubbling jumble of notes delivered as the male flies over an open field with rapid, shallow wing beats. It resembles "rob-rob Lincoln-Lincoln bobolink bobolink bobolink spink-spank-spink" or simply "bob-o-LINK bob-o-LINK bob-o-LINK". The call is a "clink" or metallic "peenk".