This could be one of half a dozen or more different warblers which would have been passing through at this time and from just a half-hidden head there's not much chance of a positive ID. My best guess would be a Sedge Warbler but I'm not 100% on that.
Coastal marshes
Lat: 39.63, Long: -0.25
Spotted on Jun 24, 2012
Submitted on Jun 24, 2012
2 Comments
Only shot I got of this one I think, I'll see if there are more on the back-up. Waiting for an answer on Bird Forum but not hopeful.
If you have any other shots, it could be helpful, though in most cases like this, birds remain unidentified.