Landowners around the greater Rotorua area are being surveyed this month in an effort by Bay of Plenty and Waikato Regional Councils, together with Department of Conservation to update information on the spread of dama wallabies.
Bay of Plenty Regional Council biosecurity officer Dale Williams said dama wallabies were unwanted pests.
"They can damage forests, farms and native bush because of the way they graze on pasture grasses and seedlings."
They were released near Lake Okareka in 1912 and have since become well established across a 180,000 hectare area, mainly between Lake Rotorua and Kawerau.
"We're working hard to stop wallabies spreading further. They're shy, mainly nocturnal and hard to find, so reports from the public are a key tool in helping us to find and remove them from new areas," Mr Williams said.