A Prolific Nestbox Grid for Tree Swallows
In 2017, two nestbox grids of 25 and 32 boxes, respectively, raised a total of 214 swallows and 12 bluebirds on the Delaware Wildlife Area. In 2018, 25 boxes making up the Leonardsburg Road Grid were moved to join 30 boxes to make a grid of 55 boxes within a five-acre field on the west […]
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