Chestnut-sided Warblers (Dendroica pensylvanica) and Blue-winged Warblers (Vermivora pinus) sing different song types in different contexts. Local dialects exist in the "Unaccented Ending" songs ...

This paper describes song structure and repertoire variation in ortolan buntings (Emberiza hortulana) from an isolated and declining Norwegian population, analysed by using the minimal unit of ...

—Not being a noted scientific bird-lover, but just a common, ignorant, obscure bird-lover, it may be presumption to think that I can add anything to the sum of bird-lore already accumulated. Perhaps, ...

Some North American birds are changing their tune. The findings fly in the face of previous hypotheses that birdsong dialects don’t change much within local regions. The rapid spread of the new song ...