Español

Mixed-species wading birds and Brown Pelican (Pelecanus occidentalis) nesting colony distribution, chronology, and composition on Isla Alcatraz

Project Description

A mixed species wading bird colony has been present on Isla Alcatraz since 1998. In 2004, Brown Pelicans began nesting amongst the wading birds. In 2001, 2005, and 2008-present the wading bird colony has been monitored for species composition, relative abundance, nesting phenology, and spatial distribution. 

Project Results

Three to eight wading bird species are recorded each year, and an average of 300 adult individuals is seen in the colony. This colony hosts the largest colony of Reddish Egrets in the Gulf of California and the 4th largest colony on the Pacific Coast of North America.

In 2011, 329 Brown Pelican nests were active 16 February and the number of active nests climbed to 542 by the end of March. A total of 796 large chicks and fledglings present in the colony on 11 May 2011. 


 

Reports & Publications

  1. Reporte de proyectos de investigación en el Área de Protección de Flora y Fauna Islas del Golfo de California (2010-11). Centro de Estudios Culturales y Ecológicos Prescott College A. C., Bahía Kino, Sonora
  2. Reporte de proyectos de investigación en el Area de Proteccion de Flora y Fauna Islas del Golfo de California (2009-2010). Centro de Estudios Culturales y Ecológicos Prescott College A. C., Bahía Kino, Sonora
  3. Research and Conservation Program Report (2007-2011). Prescott College Kino Bay Center for Cultural and Ecological Studies 
  4. Galván, J. P. (2007). California Brown Pelican Nesting on Isla Alcatraz, Sonora, Mexico. Western Birds, 38, 296-298