A duet between the CraneBox and Bluebird. CraneBox is noise box that was made during the neolithic era in Bloomington, IN. Every now and then, we used to drive down to the Crane Naval Base to scavenge through the decommissioned stuff that they gave away to the public. One time they had a bunch of musty old shell crates. Hence, the construction of the Cranebox. Something triggered and I also recalled that we used to go birding at the base. A Crane Division Naval Surface Warfare checklist is available: http://www.dodpif.org/checklists/nswc_crane.htm. The bluebird is listed as abundant in this “excellent wildlife habitat”.