During these cold winter days...I have wondered where birds sleep at night. I'm not about to go out wandering around the yard looking for birds with a flashlight. In the summer, I have scared flocks of birds at dusk...going by a tree... they flutter away and I feel bad that I've disturbed them. Do they come back or just find another roosting place? I think that they must take cover in some dark place under an eave, deck, brush pile, a hole in a tree. We leave our birdhouses up all winter, but seldom see a bird coming out of them. I have heard about people finding dead birds in a house after winter, but I have never had that happen. They must stay out of the wind and maybe under a protective overhang. Dense brush piles like we have may offer protection from wind and from predators. They can be unsightly, but the critters love them. Our little Bird’s Nest Spruce trees seemed to be a perfect place...only now they are buried in the deep snow. Hedges can hold many birds.I know many little birds sleep in our "Blue" and would miss it if it wasn't there. I think that birds can pretty much take care of themselves. They fluff up their "downy" feathers and look like little puffballs. We sleep under down comforters and down coats make us look like big puffballs. :) This has been a very cold winter so far. The birds are suffering.
I read somewhere that a chickadee eats 150 sunflower seeds during good weather and when it is below 0 they eat an equivalent of 250 seeds a day. I'm going out now and make sure the feeders are full.