Pink-eared Duck

The Pink-eared Duck, Malacorhynchus membranaceus, is a distinctive Australian species with a unique appearance. Measuring 38–40 cm in length, it is characterized by a large, spatulate bill reminiscent of the Australasian shoveler, though it is smaller in size. The bird's plumage is notable for its brown back and crown, while the sides are adorned with black and white bars. A striking feature is the black eye patches set against the white face, rendering the Pink-eared Duck unmistakable. The juveniles are slightly less vivid, but all ages share a similar plumage. The name of the species is derived from a subtle pink spot near the ear, which is only visible upon close inspection.

Identification Tips

When attempting to identify the Pink-eared Duck, look for the characteristic large bill and the unique black and white barring on the sides. The pink spot near the ear, which gives the species its name, is a key feature but may require closer observation to discern. The black eye patches on the white face are also distinctive markers for identification.

Habitat

The Pink-eared Duck is highly adaptable and can be found in a variety of aquatic environments across Australia. It has a particular affinity for standing water and is often encountered in dry inland areas where water is a precious commodity.

Distribution

This species is widely distributed throughout Australia, exhibiting remarkable mobility. The Pink-eared Duck can appear in any locale where there is standing water, with a preference for the arid inland regions where annual rainfall is scant.

Behaviour

The Pink-eared Duck is known for its dependence on plankton and small aquatic organisms for sustenance. Its feeding behavior includes a unique method known as vortexing, where pairs of ducks create a spinning motion in the water to concentrate food in a central column, facilitating efficient feeding.

Breeding

Breeding in Pink-eared Ducks is closely tied to the availability of water and the consequent increase in organic material. In favorable conditions, they gather in large numbers on shallow floodplains to breed. However, in less than ideal circumstances, they may forgo reproduction entirely.

Diet and Feeding

The diet of the Pink-eared Duck primarily consists of plankton, crustaceans, mollusks, and insects. Its bill is specially adapted to filter feed, with flexible mandibular flaps that help strain minute organisms from the water.

Conservation status

The Pink-eared Duck is currently classified as Least Concern by the IUCN Red List, indicating that it is not at immediate risk of population decline or extinction.