I have never had WBNU but right now I am once again hosting BHNU. They tolerate monitoring quite well but do like to scold. You have to be careful of the wind when you open the box because the nest is usually made of bits of thin tree bark. A super calm day is best. The other thing they do with those little bits of bark is “calk” ALL of the seams of the box. You can see the calking from the outside once they have started the nest. Very cool.
Gin
Atlanta, GA