National trust 28mm nest box birch log for blue tits & more provide a safe, natural nesting site for small garden birds with this national trust birch log nest box featuring a 28mm entrance hole. It’s perfectly sized for species like blue tits, marsh tits and coal tits, offering essential shelter and security during the breeding season. Carved from a solid birch trunk, each box is slightly different in shape and texture, blending into outdoor surroundings with a rustic charm. A sloped roof, drainage hole and secure fixings make it both functional and durable. Ideal placement: mount on a tree or sheltered wall at least 2 metres high, facing between north and east. Keep away from busy feeders to avoid disruption. Key features: * 28mm entrance suitable for blue tits, marsh tits, coal tits * natural birch construction no two are the same * developed by cj wildlife for the national trust * supports uk wildlife and conservation efforts by purchasing this product,