Eight individual ( all different shapes )purple martin nesting houses designed to create a colony nesting aspect much like the standard gourd rack affect. Wooden nesting houses are larger, better ventilated, and more creative for the woodworker that desires the same affects and more practical for the nesting birds. Much easier on the eyes than gourds. Reduced easy to follow drawings and step by step cut and assembly instructions for each individual design. Mounting arms drawing and step by step cut and assembly included. Material list for all components. Requires basic wood cutting tools.