Fig. 5. Wing-molt chronology for common guillemots and tufted puffins. The durations of each molt stage are listed (mean ± S.D.). Brackets illustrate the approximate periods of primary and secondary molt. Respective sample sizes for molt stages 1-4 were 10, 17, 23 and 22 in common guillemots and 24, 31, 19 and 5 in tufted puffins.