NATURE CLICKS #523 - FOSTER’S TERN

Foster’s Tern, Mississippi River, near Mud Lake, Iowa

Despite a stiff breeze it was a perfect day for a paddle trip with the kayaks on the Mississippi River this afternoon. It wasn’t the first time that I saw a Foster’s Tern just outside of the marina at Mud Lake but it is a bird we don’d see very often. The tern was in good company with a number of Ring-billed Gulls. They all enjoyed resting in the sun on this massive log that was stranded in the mud. The diet of a Foster’s Tern consists mostly of fish, but they also do not reject insects, small crustaceans, mollusks, or frogs. They catch fish at the surface or by plunging into the water from a perch or a hover.

The challenge was to isolate the bird from the rest of the bunch for this photo. The water was a little choppy and that’s when image stabilization in camera or lens really helps to get a sharp shot. I had to paddle into a field of water lilies in order to get between the sun in the west and the bird.

Nikon Z6II, Nikon FTZ adapter, Sigma 150-600mm / f5-6.3 DG OS HSM S,     @ 600 mm, 1/1250 s, f/8, ISO 200, image slightly cropped

Big patches of water lilies in full bloom along the shore of the mighty Mississippi

NATURE CLICKS #288 - FOSTER'S TERN

Nikon D300s, Sigma 50-500mm / f4.5-6.3 APO DG HSM

Our dog Cooper and I took a kayak trip on the Mississippi River this evening again and it felt once more like entering “wildlife paradise”. What else can you call it, if you spot during a one and a half hour tour four Bald Eagles, three Great Blue Herons, numerous gulls, pelicans, geese, ducks, blackbirds, muskrats, and turtles? This is all amazing and wonderful in the warm light of the evening sun, even if we have seen all these species many times before. 

To make a great trip perfect I discovered five Foster’s Terns sitting on logs stranded in the mud of a river bank. I have never seen Foster’s Terns here in Eastern Iowa before (only in the Bolsa Chica Wetlands in California). They were not far from a group of Ring-billed Gulls. While the gulls took off when we got closer, the terns just stayed, even when we drifted by within six feet distance. At that time the D300s was still in a waterproof bag behind my seat but the dauntless behavior of the terns made me paddling around them into a position where the light was in my favor. I took my old camera on the water and its DX sensor made for a 630 mm equivalent, with a focal length of 420 mm set at the Sigma 50-500.

I wrote before how difficult it can be to shoot with the long lens handhold from a kayak, especially if it is windy as it was this evening. I shot several bursts in continuous shooting mode and almost 200 clicks later I still wasn’t sure if I nailed it. Well, the keeper rate wasn’t too bad and finally I had quite a few images to choose from.

The photos were made on the Mississippi, just outside of the Mud Lake area, north of Dubuque, Iowa. I have seen and photographed Caspian Terns in this area last year but this is the first time that I had a sighting of a Foster’s Tern. There is still a little doubt about my identification of the species. For instance the Common Tern looks very similar, but after checking several sources I believe these were Foster’s Terns. If you are a birder or nature friend who can confirm this or have a better suggestion, I would love to hear from you.