Otago shag

The Stewart Island shag (Leucocarbo chalconotus; Māori: matapo) is a species of shag found on New Zealand's South Island and Stewart Island. The Stewart Island shag has sometimes been split into two species, the Foveaux shag and the Otago shag.

The species is dimorphic, with two plumages. Roughly one quarter of the individuals are pied, with dark and white feathers, and the rest, known as bronze shags, are dark all over. Both morphs breed together. These large, chunky birds are about 70 cm long and weigh about 2–3 kg.

Stewart Island shags vary in their facial ornamentation in the breeding season. Roughly half of breeding individuals have dark orange papillae on their face, while the other half have small bright orange caruncles above the base of the bill instead. Gular pouch colour in the breeding season also varies, from bright orange to dark orange to purple.