Table 1.

Summary of migration statistics.

	males (n=6)	females (n=6)	Wilcoxon rank-sum test
southerly migration departure date, mean (and range)	20 Sep (07 Sep–23 Sep)	21 Sep (13 Sep–23 Sep)	p=1.000
southerly migration duration, mean (and range)	25.8 days (14–44 days)	35.0 days (26–42 days)	p=0.092
time at over-wintering core (80%), mean (and range)	139.7 days (125–150 days)	149.3 days (138–156 days)	p=0.058
northerly migration departure date, mean (and range)	3 Mar (08 Feb–30 Mar)	23 Mar (01 Mar–07 Apr)	p=0.065
northerly migration duration, mean (and range)	40.2 days (30–58 days)	27.6 days (22–35 days)	p=0.019
arrival near colony, mean (and range)	13 Apr (06 Apr–29 Apr)	20 Apr (23 Mar–06 May)	p=0.229
stopover days southwards, mean (and range)	8.1 days (0–30.5 days)	13.9 days (0–23 days)	p=0.309
stopover days northwards, mean (and range)	13.3 days (0–23 days)	7.4 days (0–18.5 days)	p=0.143
number of stopovers per bird, mean (and range)	3.2 (1–6)	3.3 (2–5)	p=0.871
duration of individual stopovers, mean (and range)	6.7 days (2.5–13.5 days)	6.4 days (2.5–15.5 days)	p=0.516
total number of stopover days, mean (and range)	21.3 days (4.5–41.5 days)	21.3 days (14.5–32 days)	p=0.872