I took me awhile to get close enough with my 50mm to get this. I put my 5D3 on silent shutter mode and kept the camera raised to limit my movement. I would gradually move toward the Seagulls and stop to get some shots and get them used to my presence.
I think with this one can go both ways; with full DOF it will be nice, informative picture of how many birds you've got with one shot D, sorry, couldn't resist). But the opposite with extremely shallow DOF has own emotional level and some space for viewer's imagination.
I like the shallow DOF here - it might even be more interesting with less. I would crop the left side to remove the pole and the structure in the upper left, and also clone that light spot in the middle of the railing.
Like Timor was saying, I was trying make the picture more dramatic and to strike more emotion. KenC you are right I should have cloned out that white spot lol. I did very minor adjustments photo. Mainly just the B&W conversion and contrast adjustments.