: May 13, 2018 at Hamilton Pond. late Jul-mid Sep in fresh/brackish water ponds and marshes with shallow water and on Mount Desert Rock. The pool behind Sand Beach, when the water levels are favorable, has had multiple records.
Miscellany: There is a remarkable winter record just outside our area, Dec 13-19, 2014 in eastern Blue Hill Bay.
Last Updated: April 28th, 2022