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Bluebird box occupied by Sparrows (1 Viewer)


United States
Good morning,
We have two Bluebird nesting boxes in our yard... this spring, I've noticed Sparrows nesting in one while the other does have Bluebirds at home.
I have removed the Sparrow nest once already, now I see they are back at it again.
Are there any tips to discourage them from taking control of this box?
Thank you.

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