Fishing contest

I watched adult and juvenile Ring-billed Gulls fish for minnows in a shallow area of the Vadnais reservoir the other day. Their acrobatic flights over the water scoping out the potential fish prey was impressive, as was the success rate of their dives. Either the fish were numerous in this area or these gulls are much better dive predators than I appreciated before. During the time I watched them they were successful in grabbing a fish about 50% of the time.

Ring-billed Gulls have surprisingly long wings and are adept at gliding over a patch of water to scope out what might lurk beneath the surface.
Like terns, these gulls will suddenly fold their wings while cruising 50-100 feet over the water, drop quickly to the surface, and enter head first with their beak open to grab an unsuspecting fish. This particular attempt was a failure as the gull came up with nothing.
But this bird was successful, following a full immersion after its dive. The bird took several minutes to position the fish correctly before swallowing, and taking off again.
This youngster grabbed a smaller fish, but immediately flew off with it before swallowing. An adult was fishing nearby, so maybe it flew off to avoid getting robbed by another gull.
Fishing success may have been good here this morning, but the Ring-billed Gull diet usually consists of only about 30% fish, with the remainder made up of crayfish, worms, and a variety of insects from both marshy edges as well as land. Unfortunately, they have become all too used to humans and are frequent scavengers at garbage dumps.
Ring-billed Gulls are one of the most common gulls in the Great Lakes region, breeding in the lower Great Lakes north into mid-latitude Canadian lakes, and then returning to the coastal areas and the southern U.S. and Mexico to overwinter.

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