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I'm not a huge bird guy so I don't know what this species is, but I

can tell you the photo was taken at the Grizzly Island Wildlife Area

in the Bay Area/Sacramento Delta. It was about 30 cm tall.

You are looking at a Black-crowned Night Heron. Nice capture.

Thanks, Brian! The thing I like about these herons is that, unlike most birds, they are not easy to spook and allow for patient photography.