Esschert Design NK65 Birdhouse with Blue Tit Line DrawingBirdhouse with Blue Tit Line Drawing Brand Name: Esschert Birdhouse blue tit silhouette. This bird house has been designed for the Blue Tit. Except for the Blue Tit, you can also expect the Crested Tit, the Marsh Tit, the Willow Tit and the Coal Tit in this bird house. Many times during winter the bird house offers protection to birds seeking shelter in severe weather conditions. Item Number: NK65 Dimensions: 10. 0 x 6. 5 x 5. 75 inches Weight: 1. 45