Tamara, your gifts sound lovely, and nice that the wrens are nesting. We have Mountain bluebirds in our area but they are shy and a little timid and my yard is always full of other birds, I have only seen them visit the boxes a couple of times in the almost 12 years we have lived here, usually the swallows scare them off. Looks like we will have 3 Tree Swallow families this year.
