There were some birds around, but not as many migrants as I expected. There were a lot of Blackpoll Warblers, as is typical of late May; other than that the only migrant warbler species I detected was a Magnolia Warbler. A lot of Common Yellowthroats and Ovenbirds are setting up breeding territories, though. Numerous Marsh Wrens – actually a county bird for me – were singing in the park's extensive salt marsh. The best place to see and hear them is from the boardwalk trail near the lake parking lot. From the same trail, I could see an immature Northern Harrier cruising over the distant marsh. As it crossed the creek, it would flush Willets and other shorebirds, some of which seemed to attack the harrier – something I had not seen a sandpiper do before.