Table 1. Sampling effort and sample sizes for field foraging performance tests.

colony	foragers	bouts	foraging observations
			days	duration (hh:mm)
A	26	38	5	18:04
B	33	45	9	36:11
C	30	93	10	36:31
D	30	71	9	37:34
E	23	52	3	16:39
F	32	65	7	29:15
G	23	51	6	23:57
H	41	81	6	27:50
I	17	41	10	29:05
total	255	537	65	255:06

Data presented indicate the number of individual foragers and completed foraging bouts recorded for each of the 9 colonies (A–I). The last two columns indicate the number of days on which foraging performance was assessed, and the total duration of completed foraging bouts recorded (hh:mm) per colony.