seabird above Hilo Bay?

[csgray]

Today we took our middle school outside for some community building games on the playing fields by the Band shell. While we were there I saw a bird riding the serious winds, it was able to glide back and forth in a stiff wind about 30 feet above the shoreline. If I was in the mainland I would have thought "really big seagull" but I know we are spared gulls here. Does anyone know what I saw? It was mostly white with black along the front edge of the wings and maybe a dark head. The wings were angled in the middle, not straight, I didn't have a great view, but could see that much.

Thanks for any information from our Punaweb birders.


Carol