It's ironic, given that I'm Red/Green Colorblind, that my two good birds of the day on Saturday were a Red-tailed Hawk and Green Heron.
The Red-tailed Hawk was the same bird I saw Friday. It was again perched on a window railing of 2 East 70th Street.
The Green Heron was in a shallow area of the The Pond north of Gapstow bridge. These mudflat areas are import to wading birds, but they're constantly being removed by the Central Park Conservancy. The original landscaping of the park had water bodies with clean sculpted edges, which removed the transitional areas of marsh and mud needed by many birds. Luckily, natural erosion does a great job of bringing these mudflats back!
At about 6:56 on the video is a great shot of the Green Heron "licking its lips".