SEASONAL CHANGES IN WATERBIRD HABITAT AND OCCURRENCE IN LAGUNA DE SAYULA, WESTERN MEXICO

摘要: Laguna de Sayula, a seasonal freshwater wetland in Jalisco, western Mexico, supports many resident and migratory bird species, particularly during the dry season (October to May). We documented changes habitat condition (i.e., water vs. mudflat land cover) occur- rences of 12 waterbird species season. From October February, much lagoon was covered with mudflats, avifauna dominated by killdeer (Charadrius vociferus) long-billed curlew (Numenius americanus). Between March May, there significantly less area spotted sandpiper (Actitis macularia) were most common. Species tended co-occur plots, often large numbers, suggesting that they tracking patchy resources within study area. R ESUMEN La una cuenca endorreica estacional ubicada en el occidente Mexico apoya muchas especies aves residentes y migratorias, particularmente durante la estacion seca (octubre mayo) Documentamos los cambios las condiciones del agua lodazal cobertura suelo) presencia acuaticas seca. De octubre febrero, su mayoria laguna estuvo cubierta por zonas lodosas, dominantes fueron chorlito tildio vociferus; residente) zarapito piquilargo americanus; migratorio). Entre marzo mayo, se presentouna lodo significativamente menor, playero alzacolita macularia; migratorio) mas comunes. Varias ocurrieron mismos sitios, frecuentemente grandes cantidades, lo cual sugiere que seguian parches recursos dentro estudio.