▁than ▁seen ▁in ▁many ▁areas ▁of ▁eastern ▁Pennsylvania . ▁The ▁shore bird ▁and ▁water f ow l ▁numbers ▁can ▁rival ▁current ▁IB As ▁such ▁as ▁Middle ▁Creek ▁W MA ▁in ▁concentration ▁for ▁areas ▁in ▁eastern ▁count ies ." ▁ ▁A ▁list ▁of ▁the ▁ 1 5 7 ▁species ▁of ▁birds ▁seen ▁in ▁the ▁immediate ▁Green ▁P ond ▁area ▁and ▁recorded ▁at ▁the ▁eb ird . com ▁website ▁( a ▁joint ▁project ▁of ▁the ▁National ▁Aud ub on ▁Society ▁and ▁the ▁Corn ell ▁Lab ▁of ▁Or n ith ology ) ▁represents ▁birds ▁sp otted ▁and ▁recorded ▁since ▁ 1 9 9 0 ; ▁other ▁records ▁maintained ▁by ▁local ▁and ▁national ▁organizations ▁are ▁available ▁in ▁print ▁form ▁and ▁extend ▁further ▁back ▁in ▁time . ▁ ▁On ▁March ▁ 3 0 , ▁ 2 0 1 4 , ▁the ▁Pennsylvania ▁Or n ith ological ▁Techn ical ▁Committee ▁approved ▁Green ▁P ond ▁Marsh ▁as ▁an ▁I BA . ▁The ▁committee ▁approved ▁the ▁design ation ▁based ▁on ▁the ▁following ▁three ▁criteria : ▁ ▁D 3 - PA : ▁species ▁in ▁rare / unique ▁habitat ▁- ▁The ▁qual ities ▁of ▁the ▁area ▁meeting ▁the ▁standards ▁for ▁being ▁named ▁an ▁I BA ▁include ▁the ▁area ' s ▁shall ow ▁po ols ▁with ▁adjacent ▁open ▁fields . ▁ ▁D 4 ii - PA : ▁water f ow l ▁( > 2 , 0 0 0 ▁at ▁one ▁time ) ▁- ▁The ▁general ▁D 4 ▁design ation ▁describes ▁a ▁stop over ▁site ; ▁the ▁" ii " ▁sub design ation ▁represents ▁use