Figure 2 . Overlapping geographic assignments for migrant (a, c) and resident (b, d) juncos based on isotopic composition of feathers in yellow (a, b) and claws in blue (c, d), representing regions of high probability (top 10%) for breeding and overwintering location, respectively. Seasonal ranges for Junco hyemalis (IUCN, 2019) are shown in light gray underneath origination estimates. Hydrogen isotopic values for individual feathers (e) and claws (g) were used to estimate the corresponding median latitudes (f, h) at which those tissues were formed, with asterisks indicating significant differences between resident and migrant juncos.