Constructed from a mix of concrete and wood fibres, WoodStone® nest boxes give excellent protection from predators including woodpeckers, cats and squirrels. The material insulates the nest which creates a more consistent internal temperature than an ordinary wooden box. This is especially important during the breeding season and ensures that young birds have a greater chance of survival.
The oval hole will be used by House Sparrows, Redstarts, Tree Sparrows and Great Tits. Also the oval hole is preferred by House Sparrows and Redstarts over traditional round-hole nest boxes and House Sparrows in particular will use the larger hole to perch whilst defending their nest against rivals and predators.