Caught this little guy/gal bird banding today. One of my goals in life is to find one of their nests. They nest behind loose pieces of bark with a hammock like nest. There is even a type of bird house you can build to try and help them. Basically it is a piece of wood nailed against a tree with a spacer. Amazing little birds, that burn 4-10 calories per day! They eat mainly insects, but will sometimes eat suet and peanut butter in winter.