Fig. 5. The fit of a mathematical model of suction feeding (Daniel et al., 1989) to measurements from Euglossa imperialis. These data points were measured from starved bees, but were multiplied by a correction factor of 1.39 to be applicable to freely foraging bees. (A) Pressure drop versus sucrose concentration assuming a fixed radius of 0.045 mm; (B) mechanical power output versus sucrose concentration; (C) sucrose intake rate versus sucrose concentration.