New publication of Matthias Schlichting and colleagues

Light is the most important zeitgeber for the synchronization of the Drosophila melanogaster circadian clock. In nature, there is twilight, and the nights are rarely completely dark, a fact that is usually disregarded in lab experiments. This paper shows what happens to the locomotor activity when flies are exposed to more natural conditions in which both moonlight and twilight are simulated.

Schlichting M., Grebler R., Menegazzi P., Helfrich-Förster C., 2015 Twilight Dominates Over Moonlight in Adjusting Drosophila’s Activity Pattern. J. Biol. Rhythms 30: 117–128.