An aerial panorama looking north from the Marina Park trailhead, from the ruins of the Bayside Canning Company (left) near the ribbon-like Alviso Slough, to the Southern Pacific railroad tracks on the right. The reeds now fill in what was once a boat marina.
Image source: Cris Benton
The endangered California Clapper Rail once inhabited coastal marshes throughout central and northern California, but now are found only around the bay. Clapper rails like to hide in tall, dense high-marsh vegetation. Maybe you'll hear the harsh call that gives the bird its name: kek-kek-kek-kek-kek!
Image source: Wikipedia