riers . ▁The ▁mar sh ▁has ▁a ▁closed ▁d rain age ▁system ▁ow ing ▁to ▁the ▁separation ▁of ▁it ▁by ▁two ▁bar riers ▁along ▁the ▁east ▁and ▁west ▁side , ▁which ▁usually ▁prevents ▁the ▁free ▁exchange ▁of ▁water . ▁However , ▁when ▁lake ▁levels ▁are ▁higher , ▁the ▁mar sh ▁water ▁levels ▁fl uct uate ▁with ▁the ▁lake ' s ▁water ▁levels . ▁The ▁distinct ive ▁tri angular ▁shape ▁at ▁the ▁southern ▁tip ▁of ▁Point ▁Pe lee ▁is ▁caused ▁by ▁the ▁convergence ▁of ▁these ▁two ▁bar riers . ▁Middle ▁Island , ▁which ▁is ▁located ▁south ▁of ▁the ▁Point ▁Pe lee ▁pen ins ula ▁has ▁an ▁area ▁of ▁approximately ▁ ▁and ▁is ▁the ▁southern most ▁point ▁in ▁Canada . ▁V irt ually ▁all ▁of ▁Middle ▁Island ▁is ▁for ested . ▁ ▁Flora ▁and ▁fa una ▁ ▁O wing ▁to ▁its ▁southern ly ▁location ▁and ▁the ▁moder ating ▁effects ▁of ▁Lake ▁Er ie , ▁the ▁climate ▁in ▁the ▁park ▁is ▁slightly ▁war mer ▁than ▁the ▁rest ▁of ▁Canada ▁and ▁many ▁Carol in ian ▁fa unal ▁species , ▁which ▁are ▁rare ▁in ▁Canada ▁are ▁located ▁here . ▁Ex amples ▁include ▁the ▁fo x ▁s nake ▁and ▁the ▁five - lined ▁sk ink . ▁Because ▁of ▁its ▁location ▁at ▁the ▁cross ro ads ▁of ▁ 2 ▁major ▁migration ▁fly ways , ▁about ▁ 3 4 7 - ▁ 3 6 0 ▁different ▁species ▁of ▁mig rat ory ▁birds ▁have ▁been ▁recorded ▁in ▁the ▁park ▁and ▁more ▁than ▁ 1 0 0 ▁species ▁stay ▁there ▁for ▁bre eding