Give garden birds a safer place to nest when birds have a safe place to breed, they are more likely to return year after year. This woodstone nest box with a 32 mm entrance has been specially designed for slightly larger cavity-nesting birds, offering a secure and comfortable nesting site, with built-in protection against predators and a durable construction that lasts for years. Made from insulating woodstone and backed by a 10-year guarantee, it's a long-lasting way to support garden wildlife while giving birds the best possible start to the breeding season. Built-in protection against predators what makes this nest box stand out is its integrated marten protection. A specially shaped internal platform, positioned directly behind the entrance hole, helps prevent martens and other predators from reaching the nest, eggs or chicks. This clever design provides extra peace of mind by creating a safer environment where birds can nest and raise their young with less disturbance.