From Jane Flynn:

I saw the pair of Prothonotary Warblers at Lord Stirling Park today (Wednesday, June 27). Unfortunately, they were feeding a young cowbird. They were seen flying back and forth over the Passaic River from the trail along the river that starts at the fisherman’s parking lot. They were at a point about 500-600 feet along the trail near a large uprooted tree that has fallen across the river.

Jane Flynn
Morris Plains