Well nested, ©voyager, all rights reserved
This tree sits at the crossroad of several paths and is obviously well-favoured by some type of smallish bird. Jack and I pass this way often, but we’ve never seen an actual bird here only the nests. Maybe the birds are tucked up inside or maybe they’re out searching for food or maybe they’ve gone to Florida and won’t return until spring. We’ll keep looking, but something tells me I won’t see birds here any time soon.
My guess is that you’ll probably have to wait for spring to figure out what built those nests.
It’s one interesting thing about winter, when all leaves fall and suddenly perfectly hidden nests become visible. I like to try to guess which species they belong to, but it’s often difficult to tell. My father can almost always tell, though, by the shape, nest material and localization. He’s a bird nest expert.