People in Upper Hutt around Featherston are urged to look out for wallabies, after sightings of the dama variety in the region has authorities concerned.
Dama wallabies are capable of causing significant environmental damage, and several corpses have been recently located in the Pakuratahi Forest and near Kaitoke Regional Park.
Greater Wellington Biosecurity manager Davor Bejakovich asked the public to report any sightings of wallabies.
"We will follow up all reported sighting as it is critical to ensure wallabies do not establish themselves in our region," he said.
The appeal for public sightings follows the discovery of faeces during extensive searches in the area, including installation of trail cameras for surveillance and taking DNA samples from water.