This latest design is a lightweight nesting box made of plant fibre and is intended for installation in or on external walls of buildings of all kinds. This box is designed for Black Redstart, Pied Wagtail, Spotted Flycatcher and occasionally House and Tree Sparrow. Because of its special narrowing entrance it is safe against magpies, jays, cats and martens. When installing on a wall, please order the 1HE including mounting bracket. The box should be sited at least 2m above the ground, on or within external walls.