All Bonin Is Petrels + Dark-rumped Petrels molting 1 of 6 Wedgetails dark. at 1705 Bratley saw a Skua "very large, near Robin size, all dark except white at base of primaries on underwing. Very heavy and clumsy, short black fan-shaped tail, darker than rest of body. Short wings. Flew with slow stroke unlike any seabird I've seen yet. Sitting on water ahead of ship. Heeded SW."