Table 2. Frequency of altered behaviour resulting from disturbance by vehicles observed during focal observations of two common bird species on open-coast beaches.
| 0 = none | 1 = vigilance | 2 = shuffle | 3 = run | 4 = flight/flush | |
|---|---|---|---|---|---|
| Crested terns | |||||
| 2 | 10 | 9 | 9 | 47 | |
| (3%) | (13%) | (12%) | (12%) | (61%) | |
| Australian pied oystercatchers | |||||
| 12 | 20 | 11 | 16 | 8 | |
| (18%) | (30%) | (16%) | (24%) | (12%) | |
| Both species | |||||
| 14 | 30 | 20 | 25 | 55 | |
| (10%) | (21%) | (14%) | (17%) | (38%) | |
Behaviour was scored on a five point ordinal scale of increasing intensity from 0 = none to 4 = escapes by taking flight (see Methods for a full explanation of scoring).