House sparrows have seen considerable decline in the UK, and though they are making a recovery their populations remain in a vulnerable state. Reliant on buildings to provide the insulated shelter that they prefer, new construction methods have meant that the number of Sparrow-suitable nest sites has plummeted since the 1980s. It's therefore important that suitable nest boxes are provided to continue to support their return.
Being colonial nesters, house sparrows prefer to have multiple nesting chambers clustered close together. A time- and cost-effective way of providing suitable sites is using sparrow terrace boxes, which incorporate multiple chambers into one unit. The Dual Chamber Sparrow Terrace has twin cavities with an internal woodstone wall, providing space for two sparrow families to nest. It is constructed from wood-concrete, a blend of concrete and wood fibres that is both robust and comparatively light, as well as being an excellent insulator and breathable in the warmer summers. It's strength helps keep the inhabitants safe from predators including cats, rats, and woodpeckers, that might otherwise pose a threat to the newly hatched chicks. The front plate can be removed via a screw and washer at the bottom, in order to facilitate cleaning of the box outside of the nesting season.
The Dual Chamber Sparrow Terrace can either be integrated into a wall during the building process or mounted externally using the included fixing kit. The ideal position is close to vegetation and at least 2m above the ground, facing away from the prevailing wind. It can be painted using a non-toxic, permeable paint.