Green Island Preserve, Nikon D750, Nikkor 16-35mm / f4, B+W F-PRO Kaesemann High Transmission Circular Polarizer MRC filter
At arrival in the Green Island Wetlands today I was greeted with some nice puffy clouds. Usually I approach the area with the long lens already attached to the camera, ready to use, but this was a good reason to get the wide angle lens and polarizer out of the bag. Last year’s vegetation is rotting away and pretty soon new growth will dominate the lakes, ponds, and marsh land in the Mississippi Valley.
Immature Bald Eagle
While driving deeper into the wetlands I found a large congregation of Bald Eagles, more than 30 birds that were perched on trees or logs in the water. Seeing a few is always guaranteed but I couldn’t figure out why so many at this time of the year? Some were messing with each other but most just sat still on their perch, like this immature eagle. It had to do something with food. They mostly feed on fish and the fish population certainly didn’t grow in the wetlands since last week. So, why so many at the same place?
American Coots, Nikon D750, Sigma 150-600mm / f5-6.3 DG OS HSM S
And maybe here lies the answer. Large shoals of American Coots, thousands of “marsh hens” occupied the lakes within the wetlands. They kept very close together while moving in the shallow water and feeding on plant materials, aquatic invertebrates, or worms. I have seen Bald Eagles sitting in a tree and feeding on dead coots at other times before and maybe the large numbers attract more eagles than we see usually in Green Island along the Mississippi.