Fig. 1. The relationship between volumetric food intake in male and female Palestine sunbirds (males represented by filled circles and solid regression line; females represented by open circles and broken regression line) and (A) sucrose concentration (sucrose equivalents) of their diet (males, y=4.85x^–0.59, r²=0.83; females, y=4.52x^–0.59, r²=0.72) or (B) glucose + fructose concentration (sucrose equivalents) of their diet (males, y=25.32x^–1.07, r²=0.91; females, y=21.28x^–1.06, r²=0.96).