| Disturbance source class | Disturbance source | Disturbance events | Disturbed birds/eventa | Disturbance frequency (per bird per hour) |
---|---|---|---|---|---|
Anthropogenic | Air force | Jet fighter | 20 | 800 | 0.028 |
Helicopter | 11 | 230 | 0.004 | ||
Motor vehicle | 9 | 1110 | 0.018 | ||
Recreation | Civil airplane | 6 | 680 | 0.007 | |
Walker | 5 | 630 | 0.006 | ||
 | Total | 51 | 700 | 0.063 | |
Non-anthropogenic | Bird | Bird of prey | 8 | 990 | 0.014 |
Non-predatory bird | 14 | 810 | 0.020 | ||
Unknown | Unknown | 42 | 930 | 0.069 | |
 | Total | 64 | 910 | 0.103 | |
Experimental | Â | Walker | 118 | 720 | 0.150 |