 It is the site of the 67 km2 Cape Portland Important Bird Area which includes the cape itself, some adjacent land, a strip of coastline east of the cape extending to Policemans Point at the mouth of Ansons Bay, and nearby Swan Island.This area supports more than 1% of the world population of the Cape Barren goose, chestnut teal and the near threatened hooded plover.It also occasionally supports large numbers of pied oystercatchers, double-banded plovers and breeding fairy terns.