Pink-eared Duck

The Pink-eared Duck (Malacorhynchus membranaceus) is an Australian bird that can be identified most reliably by combining shape, plumage, habitat and behaviour. A compact duck with bold black-and-white facial stripes, finely barred body, a small pink patch behind the eye and a broad square-ended bill. Adults are typically about 36–45 cm long, although sex, age and posture can affect how large an individual appears in the field.

How to identify a Pink-eared Duck

A compact duck with bold black-and-white facial stripes, finely barred body, a small pink patch behind the eye and a broad square-ended bill. Start with the overall silhouette before focusing on colour. Check the bill, legs, tail, wing shape and any bold head or body pattern. Distance, shade and strong Australian sunlight can change the apparent colour of feathers, so several matching features are more useful than a single mark.

Often feeds in pairs or groups by swimming in circles or head-dipping, using its specialised bill as a filter. Behaviour can be one of the quickest ways to confirm an identification because closely related birds often feed, fly or perch differently even when their plumage looks similar.

Where is the Pink-eared Duck found in Australia?

Highly nomadic across mainland Australia, appearing wherever inland and coastal wetlands provide suitable conditions.

Typical habitat includes shallow lakes, sewage ponds, temporary wetlands and saline or fresh waters rich in microscopic food. Distribution can shift with rainfall, drought, breeding conditions, migration and local food supply, so an apparently unusual sighting should be checked against season as well as location.

What does the Pink-eared Duck eat?

Plankton, tiny aquatic invertebrates and seeds filtered through specialised grooves in the broad bill. Watching exactly how a bird feeds can provide another useful clue. Note whether it walks, probes, dives, sweeps its bill, hunts from a perch or catches food in flight. Feeding technique often separates species that share the same habitat.

Wild birds do not need processed human food. Protecting natural habitat, clean water and native food plants is usually a better way to support them than regular feeding.

Behaviour and calls

Often feeds in pairs or groups by swimming in circles or head-dipping, using its specialised bill as a filter.

Soft whistles and squeaky contact calls. Voice is particularly useful when vegetation, distance or low light makes visual identification difficult. Try to notice the rhythm and tone as well as a written approximation of the sound.

Nesting and breeding

Nests are usually placed in tree hollows or old nests near water, with breeding triggered by suitable inland conditions. Breeding timing varies around Australia according to latitude, rainfall and local conditions. If you find a nest or dependent young, observe from a respectful distance and avoid changing the adults’ normal approach route.

Similar birds

Australasian Shoveler also has a broad bill but is larger and males are much more colourful; no other duck has the Pink-eared Duck’s striped face.

When two species remain difficult to separate, compare photographs against multiple field marks rather than choosing on colour alone. Geographic range, voice and habitat may be more decisive than one feather pattern.

Quick identification tip

Remember three things: its approximate size is 36–45 cm; its key visual clue is a compact duck with bold black-and-white facial stripes, finely barred body, a small pink patch behind the eye and a broad square-ended bill.; and a typical setting is shallow lakes, sewage ponds, temporary wetlands and saline or fresh waters rich in microscopic food. Matching all three gives a much stronger identification than any one clue by itself.

Best places and times to look

For a better chance of finding a Pink-eared Duck, start with habitat rather than colour alone. In Australia this species is associated with shallow lakes, sewage ponds, temporary wetlands and saline or fresh waters rich in microscopic food. Early morning and late afternoon can be productive because birds are often feeding, moving between roosts and foraging areas, or calling more frequently. At wetlands, scan edges and exposed perches before walking closer; in open country, use binoculars to check distant birds before they move.

Sources and further reading

For additional Australian bird information and conservation guidance, see BirdLife Australia bird profiles and the Australian Museum bird collection. Image licensing and creator information for this page is recorded from the linked Wikimedia Commons file page.