The waterford longford bird feeders have a protective guard designed to deter larger birds and squirrels, ensuring that smaller birds have a protected source of bird food. Conveniently, jars of our peanut butter for birds and twist and feed range can be easily fitted from the rear of the feeders, 1 in the waterford and 3 in the longford. Peanuts are naturally high in calories and when blended into butter, make a tasty high energy treat for birds. We havenapost added any salt into our recipe, ensuring that this blend is nutritionally balanced and safe for your garden birds. Peanut butter intended for human consumption contains up to 100 times more salt than our specialist blend and should not be fed to garden birds or wildlife. Measurements  waterford 20x21.5x19.5cm longford 29x27.5x21.5cm peanut butter not included