▁rare ▁p ond we eds ▁( P ot am og eton ), ▁and ▁also ▁is ▁the ▁home ▁of ▁water vol es . ▁Dragon f lies ▁and ▁other ▁in verte br ates ▁occur ▁in ▁the ▁water , ▁on ▁the ▁banks ▁and ▁in ▁the ▁air ▁above . ▁The ▁reserve ▁contains ▁a ▁number ▁of ▁un common ▁plants ▁and ▁is ▁visited ▁by ▁birds ▁such ▁as ▁the ▁king fish er ▁and ▁water f ow l . ▁Ot ters ▁sometimes ▁occur . ▁ ▁The ▁Pre es ▁Branch ▁canal ▁was ▁originally ▁meant ▁to ▁be ▁an ▁extension ▁of ▁the ▁Ell es m ere ▁Canal ▁( now ▁the ▁L lang ol len ▁Canal ) ▁to ▁Pre es , ▁but ▁was ▁only ▁constructed ▁as ▁far ▁as ▁Qu ina ▁Brook . ▁It ▁is ▁only ▁navig able ▁as ▁far ▁as ▁a ▁mar ina , ▁beyond ▁which ▁the ▁reserve ▁is ▁effectively ▁a ▁long ▁p ond ▁and ▁its ▁banks . ▁ ▁References ▁ ▁Category : S ites ▁of ▁Special ▁Scient ific ▁Interest ▁in ▁Sh ro pshire <0x0A> </s> ▁Sil - Met ro pole ▁Organisation ▁Ltd . ▁( ), ▁is ▁a ▁Hong ▁Kong ▁production ▁company ▁involved ▁in ▁the ▁co - production ▁and ▁distribution ▁of ▁films ▁made ▁throughout ▁Hong ▁Kong ▁and ▁China . ▁ ▁Background ▁ ▁History ▁▁▁ ▁After ▁World ▁War ▁II , ▁Shang hai ▁film m akers ▁moved ▁to ▁Hong ▁Kong ▁and ▁established ▁four ▁production ▁companies -- Gre at ▁Wall ▁Movie ▁Enter pr ises ▁Ltd , ▁The ▁F eng ▁Hu ang ▁Mot ion ▁Pictures ▁Co ., ▁The ▁Sun ▁Lu en ▁Film ▁Co . ▁and ▁The ▁Ch ung ▁Y