Figure 1.
Sampling locations along the elevation gradient in the Cerros del Sira.
The five locations are within the Reserva Comunal El Sira, Huánuco, Peru, at 690 m, 1310 m, 1570 m, 1970, and 2220 m.
Figure 2.
Weighted mean elevation (m) for each bird species in 1969 and in 2010, minus elevation changes expected by chance from uneven sampling effort. Each dot (species) is coded according to its diet. The diagonal line is the x = y lines, points along this line indicate no change between the two time periods. N = 55.
Figure 3.
Response to warming according to trophic guilds.
Boxplot of the elevational range shifts according to diet category. Boxplot widths are proportional to the square root of the samples sizes (whiskers = sample min. and max.; box ranges = 25%–75%; band = median).