Figure 8

The effect of natal ringing date on the dates of capture in northern Africa during northward spring migration for Pied Flycatchers from nests south of (A) and north of (B) 57°N latitude, which corresponds roughly to lower European vs. Scandinavian localities, respectively. Ringing date relates directly to the date of fledging, and it is clear that birds have different responses to date in the two regions. The vertical dashed line is the date of the Solstice in each, and the points for each date are the means +/− 1 SD (From Both 2010).