Paper Rooms?

The big paper nests of Bald-faced Hornets are even found in street trees.

Once I found a Tufted Titmouse digging out the remnants of one of these nests, presumably for what was left of the larval wasps. But this post is about a note in the weekly Hudson River Almanac, put out by the state Dept. of Environmental Conservation. It seems these are a known site of winter roosts for Carolina Wrens. I’ve got to look out for this!