Fluttering Shearwater vs Campbell Islands Shag

The Fluttering Shearwater and Campbell Islands Shag are distinct in both appearance and habitat. The Fluttering Shearwater is a small seabird often seen in flight over open ocean, while the Campbell Islands Shag is a larger, more robust bird typically found near rocky coastlines and islands.

Size and habitat are the most reliable field marks: the larger size and coastal habitat of the Campbell Islands Shag contrast with the smaller, oceanic Fluttering Shearwater.

The Campbell Islands Shag is significantly larger and more robust than the Fluttering Shearwater.

Fluttering Shearwater has a more uniform dark upper side and white underside, while the Campbell Islands Shag displays a more varied plumage with contrasting colors.

Fluttering Shearwater is typically found over open ocean, whereas the Campbell Islands Shag is more commonly associated with rocky coastlines and islands.