Wooden Bird Nesting Box House - Attract wild birds to your garden with this bird box made from barked wood that looks great in natural or modern surroundings. The 30mm hole and the size of the box are suitable for a variety of small birds to nest inside roost in the winter. In rural areas, there is a huge shortage of safe natural nesting places for birds. We can all help with this by putting up nesting boxes and encouraging them to breed near your home. Cats are another huge problem for wildlife, recent figures say that cats in the UK catch up to 100 million prey items over spring and summer, of which 27 million are birds. Keep this in mind when placing the birdbox. Material: Firwood/Pine Wood and Acetate. Dimensions: 16 x 14 x 20cm. Bird nesting box - Easy to hang from a tree branch.