JEB -- Bakken et al. 207 (25): 4383 Figure IG5

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Fig. 5. Glomerular filtration rate (GFR) is responsive to water loading in broad-tailed hummingbirds. (A) During midday, prior to food/water removal, GFR increased linearly with increased water intake rate (y=0.78x+1.36, r²=0.52, N=9). (B) When we returned the food/water, following the $~$ 1.5 h deprivation period, there was no relationship between water intake rate and GFR.