 This species is nearly threatened in the 2009 "IUCN Red List".It was listed as in category "Chronically Threatened - Gradual decline" in 2002 "New Zealand Threat Classification System lists", and was classified in category C ("third priority of threatened species") according to the Molloy & Davis 1994 ranking system.However it is not in this category in the 2005 "New Zealand Threat Classification System lists".