Kerguelen Petrel vs Grey Petrel

In short

The Kerguelen Petrel and Grey Petrel can be distinguished primarily by their size and plumage. The Grey Petrel is larger with a more robust build, while the Kerguelen Petrel is smaller and more slender. Both species have similar overall coloration, but subtle differences in plumage can aid identification.

Identification tips

• Size: Grey Petrel is larger and more robust.
• Plumage: Look for the darker, bluish tint of the Kerguelen Petrel compared to the greyer, paler face of the Grey Petrel.
• Flight: Grey Petrel's flight appears more powerful.
• Habitat: Consider the location; Kerguelen Petrel is more subantarctic.

Size

The Grey Petrel is noticeably larger and bulkier than the Kerguelen Petrel.

Plumage

Kerguelen Petrel has a darker, more uniform plumage with a slightly bluish tint, whereas the Grey Petrel has a greyer tone with a paler face and underparts.

Behaviour

Both species are pelagic and often seen gliding over the ocean, but the Grey Petrel may appear more powerful in flight due to its larger size.

Habitat

Both species are oceanic, but the Kerguelen Petrel is more frequently associated with subantarctic waters, while the Grey Petrel can be found in a wider range of southern oceanic waters.