The Dark-rumped Petrel, also known as the Hawaiian Petrel, has a dark gray head, wings, and tail, and a white forehead and belly. It has a stout grayish-black bill that is hooked at the tip, and pink and black feet. This bird measures 16 inches in length and has a wing span of three feet. It has a distinctive call during breeding season that sounds like oo ah oo. They also have calls that sound like the yapping of a small dog.