Fig. 1
From: Using stable-hydrogen isotopes to reveal immigration in an Arctic-breeding songbird population
Annual stable-hydrogen isotope values of tail feathers (δ2HK) in Hatch Year (HY, blue boxes) and After Hatch Year (AHY, green; age/sex classes combined) of northern wheatears at Baffin Island, Canada. The boxplots show the median value (horizontal band inside the box), the first and third quartiles, and the whiskers give the minimum and maximum of all of the data excluding outliers. The figures at the x-axis show sample sizes. For statistics see text