Pacific Black Duck (Anas superciliosa) lives in freshwater wetlands across Australia, Southeast Asia. It feeds on insects and plants. Its conservation status is Least Concern.
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A single female can lay a clutch of 8-10 pale cream eggs, which she alone incubates for 26-32 days before the downy ducklings break free. Those hatchlings stay in the nest only until their feathers dry, then follow their mother on the ground, learning to dabble for seeds and tiny crustaceans. By about 58 days old they're ready to take to the air.
First described in 1789 by Johann Friedrich Gmelim, the Pacific black duck entered science through a water-colour sketch drawn at Dusky Sound, New Zealand, by Georg Forster on James Cook's second Pacific voyage. That illustration now serves as the species' holotype, housed in London's Natural History Museum, distribution across Indonesia, New Guinea, Australia, New Zealand and distant Pacific islands.
Two subspecies are officially recognised: A. s. pelewensis, named by Hartlaub & Finsch in 1872 and breeding on southwest Pacific islands and northern New Guinea, and A. s. superciliosa, the nominate form spreading through Indonesia, southern New Guinea, Australia and New Zealand. A third, rogersi, once listed from Australia, has been shown genetically identical to the nominate.
In New Zealand and parts of Australia, the Pacific black duck's numbers have plummeted as the introduced mallard outcompetes and hybridises with it, threatening the duck's genetic identity. Researchers note that hybrid swarms, where mallard traits dominate, could erase the grey duck as a distinct lineage, a warning echoed by feather-lice studies that track the same genetic mixing.
At just over half a meter long, the Pacific black duck stretches 54-61 cm (21-24 in) from bill to tail, with males edging out females in length and island populations sometimes shrinking and darkening their plumage.
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In the misty dawn of a Pacific wetland, the Pacific Black Duck glides effortlessly across the water, its sleek, dark feathers glistening like polished onyx as it navigates the reeds with a quiet confidence. With each stroke of its powerful wings, it leaves behind a trail of rippling water, a testament to its mastery of this aquatic realm, where it forages for aquatic plants and insects with a discerning eye. As it slips into the shadows, its distinctive white eyebrow stripe flashes like a fleeting glimpse of moonlight, a fleeting reminder of the beauty and resilience of this unassuming, yet remarkable, creature.
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