Wrens Sighting
Wrens don't seem to be very picky about where they nest. Try nest boxes with a 1 inch x 2 inch horizontal slot (1½ inch x 2 ½ inch for the larger Carolina wrens) instead of a circle. These are easier for the wrens to use. However, the larger the opening, the more likely it is house sparrows will occupy the box.
Wrens are known for filling a nest cavity with twigs, regardless of whether they use the nest to raise their young. Since male house wrens build several nests for the female to choose from, hang several nest boxes at eye level on partly sunlit tree limbs. Wrens are sociable and will accept nest boxes quite close to your house.
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