Table 1.
Echolocation and visual detection range for P. kuhlii.
| Object/method | Acoustic (m) | Acoustic (m) | Visual method 1(m) | Visual method 2(m) | Visual method 2(m) |
|---|---|---|---|---|---|
| (20 dB) | (0 dB) | 10 lux | 5 lux | ||
| Moth (18 mm) | 4 (3) | 7 (5.5) | 4.5 | 6 | 4 |
| Ant (13 mm) | 3.5 (2.5) | 7 (5.5) | 3.5 | 3.5 | 2.5 |
| Lace wing (10 mm) | 2.5 (1.5) | 5 (4) | 2.5 | 1.5 | 1 |
| Mosquito (3.5 mm) | 2 (1) | 4 (3) | 1 | 0.5 | 0.5 |
| Artificial wing (3 mm) | 2 (1) | 4 (3) | – | – | – |
Echolocation-based detection ranges are shown for four types of prey and one artificial small object. Ranges are shown for two alternative hearing sensitivities (0 or 20 dB SPL) and for either the peak or RMS (in brackets) emission levels. Visual detection range is presented for two different methods, (1) based on visual acuity and (2) based on photon flux. The second method is estimated for two different light levels (5, 10 lux). All ranges are given in meters.