Stock photo of small blue tit nestbox with 25mm entrance hole

Stock Images / Photos of Nestboxes (Birds)

Stock image of small blue tit nestbox with 25mm entrance hole

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How big you make the entrance hole is an important consideration if you are intending your nest box to appeal to certain species of birds. Blue tits will be able to enter holes with a diameter of 25 mm, while great tits are a little larger and are happy to use holes with a diameter of 28 mm.

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