Chunk of hollow walnut tree

I left a chunk of fairly hollow walnut tree sit in my shed for almost a year --just not knowing what to do with it. I knew, but didn't know how to achieve it. This spring, I sat outside and used a hammer and chisel on it, and hollowed it out even more. Made a floor and roof for it and took it out to the trail. The birds looked at it, but weren't too sure what to do with it. So, I replaced it with a conventional birdhouse and think I have probably have tree swallows in it now.

That's strange to me. Some birds are now so accustomed to man's artificial nesting sites, that when provided with a "natural" artificial site, they don't know what to do with it.

I set it up in my backyard here in town. Recently, a black-capped chickadee peeked into it, and I'm waiting now to see how long before a house wren claims it. And, my resident robins are incubating. Life is good.

Always good to hear when things are goin well!