Fig. 1. Nitrogen isotope ratios (¹⁵N; ) of the two diets and in wing membrane and blood of Leptonycteris curasoae (A) and Glossophaga soricina (B) equilibrated to diet 1. Data are given as box plots with the border of the boxes representing the 25 and 75 percentiles, the T-mark the 10 and 90 percentiles and the outermost points the 5 and 95 percentiles. The thick line within the box indicates the mean, and the thin line indicates the median.