I occasionally post articles on the Audubon Guides blog. Follow the link below to the full article.
Yellow-rumped Warbler – Millbrook Marsh (Photo by Alex Lamoreaux)
Finding Fall Warblers by Drew Weber
Finding warblers in the fall can be much trickier than finding them in the spring. Males are singing less often because they are no longer attempting to attract mates, and most of their vocalizations are difficult-to-identify chips. These chips are actually the best thing to clue in on, as they can often lead you to a feeding flock of warblers. The feeding flocks can vary in size, but when you locate one warbler there is a good chance that several others are nearby.