On Sunday, there were two Black Skimmers at Middle Harbor in Oakland
resting on the mud flat about 100 feet from shore between two rock jetties
along the eastern shore. They were there between 11:00 and 1:00 tucked
between about 40 resting avocets. I Saw a lot of interesting shorebirds
including Whimbrel, Sanderling and many Semi-palmated Plovers.