Careful

300mm, f11, 1/250, ISO 200

I had been taking sunrise shots at the St. Marks National Wildlife refuge when, as I was leaving, I saw this small bird continuously entering and leaving this clump of vegetation in the inland waterway. I watched for perhaps 30 minutes taking a variety of shots but was not able to determine whether the bird was building a nest or feeding on something in the clump of vegetation. There were many of these clumps but the bird was only interested in this one clump which greatly facilitated my shooting this fidgety and quick bird.