Figure 2From: Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird?Differences in carbon stable isotope ratios of feathers of adult Thin-billed prions. Recent samples (N = 62) were collected at New Island, and historical samples (N = 62) are from museum specimens. Histogram categories in 2A had a width of 2‰, with labels showing the midpoint. In 2B, recent and historic samples of Wilson's storm-petrels were included for comparison.Back to article page