Fig. 2
From: Inclement weather forces stopovers and prevents migratory progress for obligate soaring migrants
Weather conditions relative to the start of n = 395 stopovers (red line), averaged to individual birds (n = 34). The y-axis represents the hourly change of the variable indicated in each plot’s title. The average hourly change in each weather variable is shown in blue and the 95 % confidence interval around this estimate is shown in gray. Peaks of several variables (i.e., downward shortwave radiation, precipitation fraction, sensible heat flux, and total atmospheric water) are within one hour of the start of stopover, indicating rapid response by Turkey Vultures to deteriorating weather conditions. Several other variables are declining at the start of stopover, i.e., thermal updraft velocity, boundary height, temperature, and wind speed