Sparrow Tower Nestbox Despite being a familiar sight, house sparrows are on the UK Red List of conservation concern due to a sharp population decline of nearly 30 million since 1970. They are now an RSPB priority species for conservation. Like all the nestboxes in our Eco range, it is made entirely from recycled products. The outer shell is 100% recycled plastic, mostly from farms in the UK. It's completely inert, tough, lightweight and long lasting - the manufacturers reckon these boxes will last over 20 years. Its clever design means it slots together, so no glue or fixings. There's an inner chamber made from FSC certified strand board, itself made from recycled wood offcuts and waste. It improves insulation for the nest. It slips out easily for cleaning and has drainage holes to prevent a build up of water. Designed by professional ornithologists. Wooden nesting chamber with space for three pairs of house sparrows to nest in 32mm entrance hole Recycled LDPE plastic outer with internal FSC Certified OSB nesting chamber Construction: Outer recycled plastic panels fitted together using integral tabbing system. Internal nesting chamber stapled together. Height 65cm, width 17cm, depth 17cm (2.8kg) Use Fixing to the wall is easy with three concealed mounting holes in the back of the box near the top and a further hole near the base. The easiest and safest way to mount the box is to remove the inner, fix the outer shell onto the wall then slide the inner roost chamber back into the box and secure it in place. Supplier: The Nestbox Company