Relative times of onset and cessation of foraging

Data are shown for mornings (‘Dawn’ tab) and for evenings (‘Dusk’ tab) Site: experimental sites (N = 4). Numbers are used here and in the manuscript to designate the sites Treatment: whether the morning (at dawn) or evening (at dusk) was experimentally lighted (‘light’) or not (‘dark’) Date: day of the experimental morning (at dawn) and evening (at dusk), with 1 = 1 January. Missing days are due to experimental mishap (experimental schedule file available on demand). Temperature: daily air temperature at sunrise (at dawn) and sunset (at dusk) in degrees Celsius (obtained using light/temperature loggers, used to calculate the residuals of temperature against date in the models) Weather: whether the weather in the morning (at dawn) or evening (at dusk) was clement or adverse (snow and/or strong wind was observed) Extraction: experimenter that extracted the data (ADS = Arnaud Da Silva or DAD = David Diez-Méndez) Next columns: Tab ‘Dawn’: Daily Onset of foraging” (in min relative to sunrise) Tab ‘Dusk’ “Daily Cessation of foraging” (in min relative to sunset) for: Blackbird, Great_tit, Blue_tit, Poecile, Nuthatch, and Jay (only at dawn for the latter) For ‘Dawn’ Blackbird_outliers are data without the outliers after sunrise and Great_tit_outliers without 5 outliers >40 min before sunrise and 2 outliers >40 min after sunrise (for secondary analyses, see last paragraph of the methods)