Table 1.
Summary of daily numbers of wild birds visiting during the experimental periods (28 observation days with and 29 days without the laser in operation), grouped by taxonomic Order, observed in the free-range study area.
| Order | Laser present | Median | Min | Max | Estimated rate (95% CI)a |
|---|---|---|---|---|---|
| Anseriformes | No | 10 | 0 | 29 | 10.93 (7.75–15.96) |
| Yes | 0 | 0 | 1 | 0.04 (0.01–0.26) | |
| Passeriformes | No | 4 | 0 | 30 | 6.34 (4.37–9.20) |
| Yes | 0 | 0 | 4 | 0.25 (0.11–0.27) | |
| Falconiformes | No | 0 | 0 | 0 | 0.05 (0.02–0.13)b |
| Yes | 0 | 0 | 1 | 0.01 (0.00–0.08)b | |
| Gruiformes | No | 0 | 0 | 1 | |
| Yes | 0 | 0 | 0 | ||
| Strigiformes | No | 0 | 0 | 1 | |
| Yes | 0 | 0 | 0 |
aEstimated mean rates of visits [95% Confidence Intervals (CI)] using a generalized linear model with negative binomial distribution.
bThese rates represent the estimated rates of visits for the three Orders Falconiformes, Gruiformes, Strigiformes combined.