Corte Madera Marsh is a patch of tidal marsh southwest of the San Pablo Bay Wetlands, and is largely protected by the 1000-acre Corte Madera Marsh Ecological Preserve (Department of Fish and Game). Triangle Marsh at the south end of Corte Madera Bay, has been purchased by Marin Audubon Society. Several acres of Triangle Marsh have since been restored to tidal marsh. Marin Audubon Society has also purchased several underwater lots for conservation at the mouth of San Clemente Creek in the Bay.

The estuarine wetlands of San Francisco and San Pablo Bays are recognized together as a Western Hemisphere Shorebird Reserve Network (WHSRN) Site of Hemispheric Importance for shorebirds, the highest possible ranking.

Upsated December 2008

Ornithological Summary

This IBA supports a sizable population of California Clapper Rail (with a few Black Rail), as well as vast mudflats during low tide that are heavily used by migrating shorebirds in the region. An estimated 1,600 San Pablo Song Sparrows are present here, roughly 2% of the global population (H. Spautz, PRBO, unpubl. data).

Help us learn more about the birds at this IBA! Enter your birding data online at Calfornia eBird! (http://ebird.org/california/)

Conservation Issues

Conservation issues: Because the hydrology of this area has been so impacted, large areas of marsh are now dry, and exotic species are a growing threat. The Goals Project (1999) suggests establishing and enhancing upland buffers around the border of the wetlands to allow for the formation of seasonal ponds and to protect the wetlands from disturbance.

Ownership

Corte Madera Marsh is largely protected by the 1000-acre Corte Madera Marsh Ecological Preserve (DFG). Triangle Marsh at the south end of Corte Madera Bay, has been purchased by Marin Audubon Society.

Habitat

Corte Madera Marsh is a patch of tidal marsh southwest of the San Pablo Bay Wetlands. This IBA supports vast mudflats during low tide.

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