My apologies in the delayed reply.
The offset site is in a different vegetation corridor as the impact site, and is 20km from that site. The Koala population is the same on both sites, ie they Koala are transient throughout a larger regional area. The offset adjoins a corridor which is circa 563.5km² or 56,350 hectares in size and about 60km long. The impact site is adjacent to another area of vegetation thus allowing individuals to move during the clearing of the vegetation on the construction site. A condition of the developments Approval required that an ecologist was on site during clearing and that the clearing was to be undertaken progressively to allow for any Koalas present to move. If any trees that were to be cleared were observed to have Koala in them, they were required to be left standing until the animal had time to move. The offset calculator does take into consideration the landscape context and scale of the impact and offset site to ensure that there is no net loss of habitat.