Current breeding population of the yellowlegged gull LARUS MICHAHELLIS in Gibraltar

• Rhian Guillem ^[1] ; John E. Cortés ^[1]
  1. [1] The Gibraltar Ornithological & Natural History Society
• Localización: Almoraima: revista de estudios campogibraltareños, ISSN 1133-5319, Nº. 40, 2010, págs. 147-158
• Idioma: inglés
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• Resumen

  • Nesting Yellow-legged Gulls Larus michahellis in Gibraltar were surveyed and numbers compared to a previous census in 2002. A decrease in census nesting pairs was found (1505 compared to 1846, a decrease of approx 18%). Numbers had decreased in most areas but had increased on the east side of the Rock and in built-up areas. Results suggest that past culling efforts have been effective and that methodology has to be reviewed to attempt an increased, regular culling effort concentrating on the east side and urban sites.