Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species has been downlisted to Least Concern because although its population may be declining slowly (and the nominate subspecies may now be extinct), several large and apparently stable populations remain and it is therefore no longer reasonable to suspect a moderately rapid reduction in the overall population. The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure), and the species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2
combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation).
Distribution size (breeding/resident):
Land-mass type - Australia - Australia is classified as an Island-Continent.
Realm - Oceanic - realm
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome