Auckland Islands Shag vs Campbell Islands Shag

In short

The Auckland Islands Shag and Campbell Islands Shag are similar in appearance but can be distinguished by their distribution and subtle plumage differences. The Auckland Islands Shag is found exclusively on the Auckland Islands, while the Campbell Islands Shag is restricted to the Campbell Islands. In terms of plumage, look for differences in facial coloration and body patterning.

Identification tips

1. Location: Check the location first; Auckland Islands Shag on Auckland Islands, Campbell Islands Shag on Campbell Islands. 2. Facial Markings: Look for the extent of white on the face and neck; Auckland Islands Shag tends to have more pronounced white patches. 3. Overall Plumage: Note any subtle differences in the contrast between dark and light areas of the plumage.

Size

Both species are similar in size, typical of large shags, with no notable differences in structure or proportions.

Plumage

The Auckland Islands Shag typically has a more pronounced white patch on the face and neck, while the Campbell Islands Shag may show less contrast in these areas. Both species have dark upperparts and white underparts, but the extent and sharpness of these markings can vary slightly.

Behaviour

Behaviorally, both species are similar, often seen diving for fish and resting on rocky shores. There are no significant behavioral differences noted between the two.

Habitat

The Auckland Islands Shag is found on the rocky coasts of the Auckland Islands, whereas the Campbell Islands Shag is confined to the rocky shores of the Campbell Islands. Both prefer coastal environments with access to the sea for feeding.

Voice

Vocalizations are not well-documented for either species, and there are no known distinctive differences in calls that can aid in identification.