Fig. 2

Boxplots summarizing migration parameters for satellite-tagged Grey Plovers migrating between the Wadden Sea and Arctic breeding sites. Data for spring migration are split according to the route, inland versus coastal migration (cf. Fig. 1, Additional file 2: Fig. S2). Stars indicate significant differences between the inland and coastal route on spring migration; stars within the ‘autumn box’ indicate significant differences between spring and autumn migration (for details see text). The boxplots show the median as horizontal line in boxes, the 1st and 3rd quartiles and the minimum and maximum values