▁in ▁the ▁z oning ▁map , ▁is ▁Green ▁P ond ▁G olf ▁Cour se , ▁Inc ., ▁with ▁a ▁purchase ▁date ▁of ▁January ▁ 1 , ▁ 1 9 7 9 . ▁ ▁E colog ical ▁significance ▁ ▁Studies ▁are ▁currently ▁under way ▁to ▁determine ▁the ▁extent ▁of ▁the ▁mar sh y ▁area ▁and ▁its ▁qual ification ▁as ▁a ▁Feder ally - recogn ized ▁and ▁- protected ▁wet land . ▁The ▁par cel ▁and ▁ad jo ining ▁areas ▁recently ▁received ▁a ▁Pennsylvania ▁Aud ub on ▁Society ▁design ation ▁as ▁an ▁" Import ant ▁Bird ▁Area " ▁( defined ▁by ▁the ▁Aud ub on ▁Society ▁as ▁" sites ▁that ▁provide ▁essential ▁habitat ▁for ▁one ▁or ▁more ▁species ▁of ▁bird "). ▁M embers ▁of ▁the ▁Le high ▁Valley ▁Aud ub on ▁Society ▁and ▁other ▁qualified ▁spot ters ▁have ▁identified ▁ 1 6 1 ▁species ▁of ▁birds ▁in ▁the ▁Green ▁P ond ▁Marsh ▁area , ▁including ▁the ▁Pennsylvania - end anger ed ▁species ▁of ▁American ▁bit tern , ▁black - c rown ed ▁night ▁her on , ▁black ▁t ern , ▁black p oll ▁war b ler , ▁common ▁t ern , ▁and ▁great ▁eg ret . ▁The ▁two ▁Pennsylvania - th re aten ed ▁species ▁are ▁the ▁northern ▁har rier ▁and ▁the ▁o sp rey . ▁ ▁Design ation ▁as ▁an ▁Import ant ▁Bird ▁Area ▁( I BA ) ▁ ▁A ▁descript ive ▁document ▁file d ▁with ▁the ▁National ▁Aud ub on ▁Society , ▁Pennsylvania ▁Aud ub on , ▁and ▁the ▁Le high ▁Valley ▁Aud