The other weekend K and I went birding at the Martin Luther King, Jr. Shoreline. The walk was advertised as accessible and for beginning birders, and was led by Clay Anderson and others from the California Center for Natural History. We saw a Cooper's hawk, great blue heron, lesser egrets, pelicans, and more. But the thing that got the more experienced birders excited was seeing a Ridgway's rail (formerly known as a clapper rail), a bird which is a near-threatened species. It's also less common to see because of its nature—it spends most of its time in long marsh grass. So you'll hear them more than you'll see them, at least once you recognize the call.