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Four UK shorebirds - the grey plover, dunlin, turnstone and curlew sandpiper - are becoming more endangered on the red list.

In spring, two dozen species of shorebirds use the refuge as a way station — primarily Western sandpipers and dunlin.

Reynolds said he will always remember the call he got that first year from a biologist reporting on a flooded field filled with 5,000 small wading birds called dunlin.

I’m gaping at thousands of western sandpipers and dunlins twisting and turning against the sky creating an undulating kaleidoscope of color.

A cloud of tiny dunlin, more compact than starlings, turned in the air with the noise of a train.