The Seagull

We were having lunch at Gosman's Dock under the umbrellas, when I looked to the right and saw this. Yuk! I hope a seagull was not perching on our umbrella. Anyhow, this photo is not about seagulls at all, of course, it is about the design of the photo, and the gull was just the point of interest. The real subject is triangles, right?