From the North American Butterfly Association
White Clay Creek Preserve Chester County, PA
One-and-a-half hour walk, 4:30—6:00 p.m. Temperatures, 56—58 degrees, but mostly sunny.
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2000-2011 sightings
One-and-a-half hour walk, 4:30—6:00 p.m.
Temperatures, 56—58 degrees, but mostly sunny.