Table 3.

Comparison of impulse response time to peak (t _p) and half-width (Δt) for bumblebee photoreceptors with published photoreceptor data from other insect species

Species	Spectral type	t_p (ms)	Δt (ms)	Reference
Cricket	Unspecified	22.8	16.6	Howard et al., 1983
Locust	Unspecified	21.9	16.2	Howard et al., 1983
Mantid	Unspecified	18.1	13.3	Howard et al., 1983
Hoverfly	Unspecified	16.5	12.8	Howard et al., 1983
Bumblebee	UV	15.7	12.3	Present study
Dragonfly	Unspecified	17.5	11.4	Howard et al., 1983
Bumblebee	Blue	13.9	9.8	Present study
Calliphora	R7–R8	12.4	8.8	Anderson and Laughlin, 2000 ^a
Bumblebee	Green	12.5	7.9	Present study
Housefly	Unspecified	12	6.4	Howard et al., 1983
Calliphora	R1–R6	7.2	4.7	Anderson and Laughlin, 2000 ^a
Calliphora	R1–R6	7	4.3	Tatler et al., 2000 ^b

Measurements of t _p ranged from 9.7 ± 0.2 ms at 19°C to 5.4 ± 0.1 ms at 34°C; tabulated values are estimated from response at 22°C, illustrated in Fig 1 A of the reference.
↵ ^a Female flies.
↵ ^b Male flies.