Our WoodStone® range of nest boxes have been designed and developed as part of our professional Vivara Pro range. Unlike a traditional wooden nest box, this box will not rot away or deteriorate. Every WoodStone® nest box from CJ Wildlife is guaranteed for 10 years. A lack of suitable nesting sites is thought to be the main reason behind the decline of Swift populations. The Build-in Nest Box is nest box is constructed from a mix of concrete and wood fibres, WoodStone® nest boxes safeguard against attacks from predators including woodpeckers, cats and squirrels. This box can be mounted onto a wall or it can be unobtrusively built into the fabric of the wall. The front of the nest box can be removed for cleaning. Site at least 5 metres high and with a clear flight path, avoiding south facing sites.