FIGURE 3.

Whole blood and feather δ² H (mean ± SE) values in Z. capensis in birds that breeding at high and low elevations in the Center (a) and South (b) of Chile. The dates show significant difference between feather δ²H values (representing summer) between birds that breeding at high and low elevation in each latitude. Comparison of blood δ²H values (representing winter) between elevations show significant differences only in central zone. Significant difference between blood δ²H values (representing winter) and feather δ²H values (representing summer) were found at high elevation in the central zone and at low elevation in south zone. The bold horizontal line inside the box represents the median δ²H values. Vertical lines indicate standard error and asterisks indicate significant differences among groups.