Fig. 7
From: Wintering North Pacific black-legged kittiwakes balance spatial flexibility and consistency
Ecoregion use of black-legged kittiwakes (Rissa tridactyla). a Percent of black-legged kittiwakes using each ecoregion, with the proportion of males in green and females in yellow. The California Current (CCAL), denoted by an asterisk, was visited exclusively by female kittiwakes. Counts of males and females in each ecoregion are not significantly different than the overall sample (Chi squared, p > 0.05). b Number of ecoregions used by individual birds from St Paul (yellow) and St George (orange)