Fig. 2.

Boxplots illustrating variation in migration characteristics of Herring Gulls in eastern North America. Long distance migrants from the eastern Arctic are shown in grey, and short distance migrants from Newfoundland, Sable Island, and the Bay of Fundy are shown in white. Migration characteristics include a) distance, b) duration, c) start date, d) end date, e) directness, f) migration speed, g) travel speed, h) stopover days, i) travel:stopover ratio, and j) stopover length