Mergus australis
The New Zealand Merganser, *Mergus australis*, was a distinctive and critically unique waterfowl species endemic to New Zealand, tragically declared extinct in 2006. This medium-sized duck measured approximately 58 cm (23 inches) in length, featuring a striking appearance with males displaying a dark, glossy greenish-brown head and a shaggy crest, a dark slate-grey back, and contrasting white underparts. Females were generally duller, lacking the bright coloration and having a less pronounced...
Primarily frequented freshwater lakes, slow-moving rivers, and lagoons, preferring areas with dense forest or bush cover, typically at low to moderate elevations.
Mainly consumed small fish, freshwater invertebrates such as crustaceans and insect larvae, caught by diving underwater.
Due to its rapid extinction, detailed behavioral observations are scarce, relying largely on inferences from related species and early accounts. It was likely a diurnal species, spending much of its time foraging by diving for prey in freshwater bodies. Like other mergansers, its serrated bill wa...
Historically endemic to New Zealand, the New Zealand Merganser's distribution was largely confined to the South Island, particularly the Fiordland region where the last known specimens were collected. There were also historical records from scattered localities on the North Island, though these p...
Extinct
- The New Zealand Merganser was first described scientifically in 1840, relatively late for a distinct species. - Its extinction was remarkably swift, with the last confirmed sighting occurring in 1902, barely 60 years after its discovery. - Only about 26 specimens exist in museum collections wor...