Additional file 1: of The effect of weather on the decision to migrate from stopover sites by autumn-migrating ducks

Migratory departure status (0 = no departure, 1 = departure) for each day included in our analysis and the associated weather conditions for those days (WINDALOFTDIRFROM: Direction from which wind is flowing at 433 m above ground level; WINDALOFTINDEX: 1 = Wind aloft is following relative to preferred direction of travel, given observed departure tracks over entire study period, 0 = Wind aloft is opposing relative to preferred direction of travel, given observed departure tracks over entire study period; PRECIPINDEX: 1 = No precipitation observed at time of departure [2300 GMT], 0 = Precipitation observed at time of departure; CLOUDCOVER: number of eighths of the sky covered by clouds at time of departure; CLOUDCOVERINDEX: 1 = Between 0/8 and 7/8 of the sky is covered (i.e., stars are partially visible), 0 = 8/8 of the sky is covered (i.e., complete overcast); TEMPERATURE: Surface air temperature at time of departure (°C); TEMPCHANGE: Difference in mean daily temperature (°C) between the 24-h period immediately preceding a departure/non-departure event and the 24-h period prior to that day; DAILYMINT: Minimum daily surface air temperature observed for the calendar day (°C); PRESSURE: Barometric pressure (mb) observed at the time of departure; PRESSURECHANGE: Change in barometric pressure over the six hours preceding typical departure (1700–2300 GMT); CLOUDHEIGHTINDEX: 1 = Cloud ceiling> 600 m, 0 = Cloud ceiling< 600 m; SURFWINDSPD: The rate of horizontal travel of air past a fixed point (m/s); HABITAT: Qualitative index of waterfowl food production measured within study area in August/September with 0–2 = no or poor food production, 3–4 = fair, 5–6 = good, 7–8 = very good, and 9–10 = excellent [NA = Not available]. (CSV 39 kb)