Wrens often build several nests before the female chooses the one to lay in.
Despite having several corvids, mostly jackdaws and jays, woodpeckers and the odd squirrel, I've got several young birds coming to my feeders. Was watching a pair of coal tits feeding a chick this morning.
Got young robins, chaffinches, blackbirds all coming in.
Pics with phone on a mucky morning through a mucky window ??
Cheers, D.