Over the last few years I've been putting up bluebird nesting boxes. There are about 25 of these boxes but nary a bluebird. They are mostly occupied by tree swallows with a few home to wrens. Bluebirds would be nice but swallows and wrens also need homes so they are not begrudged.
Two boxes are on electricity poles in a pasture. These boxes are placed six feet above the ground so that cattle will not rub them off the pole. Last year one of these boxes was knocked from the pole and the only possible culprit was bovine. Every fall I clean the boxes so they are prepared for spring nesting. The broken box was repaired and replaced.
This summer it has been destroyed again. Why this box and not the other. There's also a box on a fence post less than four feet off the ground that's never been damaged. What critter has it in for this box? A trail camera in proximity could identify the culprit but all the cows look alike. It remains to be seen if it is repairable, and if so, should it be place in a different place?
Takk for alt,
Al
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