Black-crowned night heron. This photo is from a website and was obviously taken by a professional.
Below is my photo taken on my walk this morning. Think of it as a "Where's Waldo?" exercise. The marking above the beak is the give-away. The granddaughter did the i.d.-ing with the Audubon bird app on the iPad. We saw a second bird very much like this one--but not exactly. One is a male, the other a female, but they're both black-crowned night herons.