Auckland Islands Shag vs South Georgia Shag

In short

The Auckland Islands Shag and South Georgia Shag are similar in appearance but can be distinguished by their geographic range and subtle differences in plumage details. The Auckland Islands Shag is endemic to the Auckland Islands, while the South Georgia Shag is found around South Georgia and the South Sandwich Islands.

Identification tips

1. Location: Check the geographic location; Auckland Islands Shag is only found in the Auckland Islands, while South Georgia Shag is found around South Georgia. 2. Plumage details: Look for subtle differences in the sheen of the black plumage and the extent of white on the face and neck. 3. Behavior and habitat: Observe typical shag behavior and habitat preferences, but rely on location for the most reliable identification.

Size

Both species are similar in size, typical of large shags, with no significant differences noted in field conditions.

Plumage

Both species have a similar overall black and white plumage pattern. However, the Auckland Islands Shag may show a slightly more iridescent sheen on its black upperparts, while the South Georgia Shag can have more pronounced white patches on the face and neck.

Behaviour

Both species exhibit typical cormorant-like behavior, such as diving for fish and drying their wings on rocks. There are no notable behavioral differences in the field.

Habitat

The Auckland Islands Shag is restricted to the Auckland Islands, often seen along rocky coastlines. The South Georgia Shag inhabits the waters around South Georgia and the South Sandwich Islands, also favoring rocky shores.

Voice

Vocalizations are not well-documented for either species, and there are no known distinctive differences useful for field identification.