Fig. 6
From: WATLAS: high-throughput and real-time tracking of many small birds in the Dutch Wadden Sea
Small-scale space use during different phases of the tidal cycle for 221 red knots near Richel and Griend (locations labelled in panel B) between 1 August and 1 November 2019 (92 days). Panels show different phases of the tidal cycle from high tide (panel A), through ebb tide (panels B and C), to low tide (panel D) and flood tide (panels E and F). The colour scale represents the number of localizations in 250 × 250 m grid cells. The boundary of mudflats are indicated with a grey dashed line (i.e. the lowest astronomical tide, LAT). The blue line indicates the lowest water level within the different tidal phases. Land is indicated with a solid black line. Because the tags send a signal at 1/6 Hz, each localization represents a minimum of 6 s of space use for red knots. See rectangle A in Fig. 1 for placement of this map within the study area. The coordinate system refers to UTM 31 N. © map data from Rijkswaterstaat