birdhouses installed

I mentioned that Mike has been hard at work building birdhouses for the pasture. He put the first one up last week, and a pair of tree swallows immediately moved in, so he decided to put up the other two. Bluebirds moved into house 2 ... and another pair of bluebirds took over house 1, which the swallows are not happy about at all. So we've got a turf war on our hands. Who will win? Stay tuned!