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Dunlin and Semipalmated Sandpiper Flock in Flight, Delaware Bay | by Nate Zalik
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Dunlin and Semipalmated Sandpiper Flock in Flight, Delaware Bay

This image is from last week’s trip to Delaware Bay. As the tide receded, it was interesting to watch the huge flocks of shorebirds continue to fly to areas that were recently exposed by the falling water level. Presumably they were feeding on tiny horseshoe crab eggs that had been washed into the water. The brown objects in the water are horseshoe crabs waiting just offshore during the day. During the evening high tide, the crabs would emerge from the water to spawn, with each female laying thousands of small, green eggs. These eggs provide an abundant food source for the migrating shorebirds.

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Taken on May 18, 2011