Accuratedly monitor your colony with the ingenious 8" weather resistant plastic prognosticator and the laminated martin photos. Includes Purple Martin prognosticator and photos These life-size color photos follow a martin nestling from hatching day through fledging day, a total of 30 photos. Laminated to make a valuable tool for landlords, especially when paired with the Prognosticator. Includes Purple Martin prognosticator and laminted martin photos. Accuratedly monitor your colony with the ingenious 8" weather resistant plastic prognosticator and the laminated martin photos. With the purchase of this item, you will receive a three month subscription to the Purple Martin Conservation Association, limited to one free subscription per household. Purple Martin Market Place offers high-quality items for martin enthusiasts. Buy with confidence knowing that we have directed the development of much of the merchandise and what we offer has been approved by the Purple Martin Conservation Association. Profits generated support the PMCA’s conservation, education, and research programs.