Table 1.

Summary of drongo behaviour according to foraging mode. (Means (±s.e.) represent averages for all drongos combined.)

behaviour	foraging mode
	solitary	kleptoparasitic
proportion of observation time spent foraging
aerial and terrestrial foraging combined	0.83 (0.03)	0.49 (0.07)
terrestrial foraging only	0.05 (0.01)	0.04 (0.02)
average perch height (m)	4.28 (0.56)	3.70 (0.32)
proportion of observation time spent vigilant	0.06 (0.02)	0.38 (0.07)
alarm calls given/total predator sightings
aerial predators	0.92 (0.14)	0.95 (0.15)
terrestrial predators	0.06 (0.19)	0.87 (0.15)
average mass of items caught (g)	0.28 (0.04)	0.72 (0.39)
biomass captured (g) per hour	1.61 (1.40)	3.49 (5.20)