Table 1.

Locking quantification. Lockings rates, i.e. percentage of frequency sweeps in which phase-locking was observed, obtained from 33 frequency sweeps at piezo voltage amplitudes of 1–10 V.

	locking rate per locking order				locking rate per fly
	1 : 2	1 : 1	3 : 2	2 : 1
fly 1	100	100	83	83	92
fly 2	25	50	50	25	38
fly 3	67	67	67	67	67
fly 4	50	33	33	0	29
fly 5	60	20	60	20	40
fly 6	33	17	17	0	17
mean locking rate per locking order	56	48	52	33	mean locking rate per fly ± s.d. 47 ± 10