Presumably overheated. There was a second one in the vicinity
Bronx Zoo
Chick
Wild bird by pond to the right of the birds
Fledgling
Best estimate is the Double-crested cormorant, based on my unaided eye observation and pictures. Did not confirm the orange facial features, but the beak and profile appears to most closely fit the Double-crested cormorant based on likely water birds in the area.