The goal of Dawn Chorus is to document the early morning song of birds at different locations, and across multiple years. Based on the collected data we hope to verify the occurrence of different (singing) species, and follow its development across years. This could help investigating species decline or disappearance in different habitats (including in cities), and to find explanations. Further, we hope to shed some light on the present types and intensities of human-made noise sources (e.g. traffic noise), and how they may influence bird song.