Thanks to a couple of more experienced birders who spotted and identified it with their binoculars, I saw and photographed this bird in the brief second or two that it spent on the surface between dives. It’s a Horned Grebe in the winter, nonbreeding plumage. It’s smaller than the Clark’s Grebe that was also feeding nearby in the North Basin at the same time. When these birds are in their breeding plumage they put on quite a colorful show; click on the link to see images. They’re mostly solitary birds, feeding and migrating alone, but pair up after courtship and build a nest and incubate and feed the young together. The young can swim at birth and can fly at about two months.