Figure 2: Activity pattern of migrant and resident birds seven days before the departure of migrants. | Scientific Reports

Figure 2: Activity pattern of migrant and resident birds seven days before the departure of migrants.

From: Abrupt switch to migratory night flight in a wild migratory songbird

Figure 2

Mean activity % and standard error of migrant (blue) and resident (orange) European blackbirds (Turdus merula) in 30 minute intervals four days prior to departure. White and grey backgrounds represent mean day and night-time respectively. Dashed vertical lines represent the variation in dawn and dusk onset during the time of the study. Sample size: 21 migrant individuals (11 females, 8 males and 2 unknown sex birds; 2 individuals with multiple departure events) and 23 resident individuals (3 females and 20 males).

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