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Problems caused by the Silver Gull (686 words) |
 | Silver Gulls can create a hazard to aircraft at airports; they may contaminate water storages, roofs, picnic areas and public swimming pools with faeces and regurgitated matter. |
| Gulls roosting or nesting on roofs can cause blockage of gutters with regurgitated bones and with nesting material; reduce the life-span of roof materials; and disturb staff with noise, odours and by swooping during the nesting season. |
| Silver Gulls may compete with other bird species for breeding space and prey on their eggs and young. |
| EVALUATION OF LEG BANDS FOR VISUAL IDENTIFICATION OF FREE-LIVING SILVER GULLS (12331 words) |
| Some 15,950 gull chicks were banded on the nest at 15 island breeding colonies, 173 juveniles were clap-netted and banded in the Beachport area, and 1287 adult gulls were banded after nest- trapping or clap-netting: 142 on islands at Encounter Bay and 1145 in the Beachport area (Fig. |
| Correlation between the time Silver Gulls were known to be alive and the number of records for individual gulls, for a sample of 188 breeding adults banded at Beachport, South Australia, 1968 and 1969 (rxy =.385). |
| Because all gulls had 2 bands, a number band and a color band, both of which were readable on the uncaptured birds, less than.2% of records were rejected as a consequence of unresolved errors. |
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