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Shorebird Waterfowl and Waders Monitoring Research

In Biological Monitoring, Bird Monitoring, Birds, Research by Administrator

Description of monitoring Twice each spring and fall during peak migration, volunteers identify and count shorebirds, waterfowl, and waders at low tide during timed watches at four defined areas of Reserve wetlands and adjacent areas. Surveys are carried out by boat (from the main channel) and land.  (An additional site is also surveyed at high tide). The experience is challenging …

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Shorebird and Waterfowl Monitoring Research

In Biological Monitoring, Bird Monitoring, Birds, Research by Administrator

Past shorebirds and waterfowl monitoring in and around Elkhorn Slough (1989-2000) Over the last several decades, various shorebird and waterfowl monitoring has been carried in and around Elkhorn Slough. From 1989-2000, for example, Sue Shaw faithfully recorded all shorebird and waterfowl seen during her regular visits to measure water quality at 24 stations. The stations were located along the entire …

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Raptor Monitoring Research

In Biological Monitoring, Bird Monitoring, Birds, Research by Administrator

Elkhorn Slough Reserve hosts a variety of breeding raptors. In a typical year, there may be 2 pairs of white-tailed kites, 1 pair of red-tailed hawks, 1 pair of red-shouldered hawks, and 4 pairs of barn owls. These top carnivores are often good indicators of ecosystem health: if they fail to reproduce successfully, this may be the result of pesticide accumulation …

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Caspian Tern Monitoring Research

In Biological Monitoring, Bird Monitoring, Birds, Research by Administrator

Since the early 1990s, a colony of Caspian Terns – the world’s largest terns – has bred on an island in the Reserve’s restored South Marsh area. The colony has suffered various disasters over the years, from pesticide contamination during the 1995 floods to raccoon predation in 2000. The 2001-2003 breeding seasons had excellent reproductive success, but were followed by …

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Nest Box Monitoring Research

In Biological Monitoring, Bird Monitoring, Birds, Research by Administrator

A program monitoring about 150 nest boxes in the oak woodlands of ESNERR began in 1998. Each spring and summer the nestboxes are monitored weekly by a team of volunteers. By carefully checking the boxes and consistently recording what they see, the volunteers are able to obtain data on: – nest box occupancy (which boxes are occupied and by which …

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Rookery Monitoring Research

In Biological Monitoring, Bird Monitoring, Birds, Research by Administrator

BRIEF SYNOPSIS OF PAST Elkhorn Slough Reserve ROOKERY MONITORING 1985-2001 Description of Monitoring Each year, the rookery comes alive with the cacophony of nesting herons, egrets, and cormorants and their rowdy offspring. Volunteers and ESNERR staff have been monitoring the rookery for over a decade. We track abundance of adults and active nests for the three breeding species, track their reproductive …