Pied Cormorant vs Stewart Island Shag

The most reliable field mark to distinguish the Pied Cormorant from the Stewart Island Shag is their plumage pattern. Pied Cormorants have a distinctive black and white pattern, while Stewart Island Shags have a more uniform dark appearance. Observing these differences in plumage can be crucial for accurate identification.

Check plumage pattern: Look for the contrasting black and white plumage in Pied Cormorants versus the more uniform dark plumage of Stewart Island Shags. Observe face and underparts: Pied Cormorants have a white face and underparts, which are absent in Stewart Island Shags.

Pied Cormorants exhibit a striking black and white plumage, with a white face and underparts contrasting sharply with their black back and wings. In contrast, Stewart Island Shags have a more uniform dark plumage, lacking the distinct white areas seen in Pied Cormorants.