#10140 GOLDENEYE HOUSE (24-1/4"h x 11"w x 15-1/2"d) Appropriate opening size for Goldeneyes. Mount on a tree or post over or near water. Coveside's house has a wire ladder to help the ducklings climb out. A lower side guard protects the nest when the side is open for observation. The entire side opens for cleaning. Comes with wood chips as required for nesting material, which should be renewed each nesting cycle. As with all our nest boxes, the design includes appropriate ventilation, drainage and opens for easy clean-out. Sustainably grown 1" thick Eastern White Pine provides superior insullation. Hand crafted with pride in Maine.