Field sampling
We carried out daily CMR between 6th June and 24th July, 2020 from 11:00 to 17:00 by capturing mature individuals with hand nets and marking them with a permanent marker on the hind wing. Two observers continuously walked across the study site to capture unmarked individuals and tag recovery. Before releasing individuals at the point of capture, hind wing length (surrogate of body size) was measured with an electronic caliper to the nearest 0.01 mm. We used two resighting methods: (1) conventional observations with the naked eyes (CV), and (2) high-speed videos using the Sony RX10 Mark4 with 250 fps high-frame-rate mode, which is 8-10 times more frames than normal cameras (allowing to slow the motion 8-10 times). The videos were later visualized for identifying the individual code (Fig. 1). We asked how the use of a high-speed camera increases the number of resightings relative to conventional observations alone, and, further, whether inclusion of camera data can improve estimates of survival and accompanying covariates (age and body size).