I used to have barn swallows, in the barn, every year. There is still
a place for them to nest, but they haven't been here for at least a
decade. And I always had tree swallows, but this year they checked
out the house and didn't come back. On my trips from Lincoln to
Middlebury I have seen very few swallows of any sort. I just tried to
use ebird to see if there is a trend statewide, but couldn't figure
out how to do that. I'd love to see data for the last 10 or 20 years.