Only 1 but it’s a start. He’s in the house for the night. Bluebirds ain’t happy bout it either. A pair of bluebirds had been on it for a month. Guess they have a nest going. Hope they can get along for this year. I have 1 bluebird house up now and going to put out 4-5 more next spring. To late this year
Don are you sure the bluebirds have started a nest? It is not recommended to let bluebirds nest in your Martin housing. They could keep Martins from claiming the house and starting your colony.