These classic nest boxes are ideal for most garden birds and offer thick wooden walls for insulation. Perfect for smaller birds in particular, these birdhouses come in a great value pack of four allowing you to position them at different vantage points. The top panel can be unscrewed if required to provide a nest box more suited to birds preferring an open fronted nest such as Robins, Wrens and Pied Wagtails. During the colder months, providing shelter for our garden visitors is essential, and these sturdy bird boxes are a perfect welcome for our feathered friends. The boxes measure 21cm x 14.5cm x 12cm while the removable panel is approx 14.5cm by 9cm.