Fig. 15

American Robin migration. This figure contains two components—an inset actogram displaying the activity of an American Robin over 10 months and detailed activity and temperature data for 5 days centered on November 20, 2021. Rows in the actogram contain 48 h of activity data (the percentage of a sample bucket that the animal was active) and rows are stepped by 24 h. Thus each day appears twice—first on the right of the actogram and then on the left of the next row. The primarily light regions of the actogram correspond to night and the primarily dark regions correspond to day. The activity detail includes both the activity level (the fraction of the integration period in which the animal was active), and the processor temperature. Note that during the night of November 19 (UTC) the animal made an extended flight. During this flight, the processor temperature declined. Also shown on the actogram is nocturnal activity during March 3–5, 2022