I think it was a good compromise, because the tree swallow seemed as if it may be one which was raised in the same box last year. On the day that the swallows left; last June, there were 2 adults and 3 young. When the tree swallows came back in March; there were 5.
The annual bird wars normally last; until a house wren moves in and takes over during the feud. The bluebirds are usually the one that gets left out and moves on.
Perky Pet 50301 Wren Home Cedar Birdhouse
Posted by High Virginia Outdoors Photography by High Virginia Images
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