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This is the way it is supposed to work. My daughter has a gymnastics class in the office park right off the Blue Heron Trail in Needham. So I get an hour to walk in the woods while she's in class.
I walk down the trail, cross the road to get to Nahanton Park in Newton, listen for chickadees, find them, pick up the binoculars, and...
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pine warbler.
The chickadees must have found something really good, because they were chatting up a storm. The warbler was definitely checking it out. In fact, doing some chickadee-esque acrobatics while bug catching.
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Probably the best look I've gotten this year. Low light but right out in the open.
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Thanks, pine warbler!
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[UPDATE: My colorblindness makes me wonder: is this actually a blackpoll?]