To donate to the Prairie-Hills Chapter of the Audubon Society you may 1. Send a check to Prairie Hills Audubon Society, at P.O. Box 788, Black Hawk, SD 57718 2. Use PayPal by clicking the button below (you do not need a PayPal account and any of the credit cards below are accepted). Your donation will go directly to conservation programs in the Black Hills and surrounding prairies. If you wish to also become a member of The National Audubon Society and direct your membership donation towards the PHAS please click here. Thank you. Prairie Hills Audubon Society is a non-profit corporation and our purpose is to engage in such educational, scientific, literary, historical, charitable pursuits and purposes that will educate about, protect and restore our environment and natural heritage.