Great-winged Petrel vs Providence Petrel

In short

The bill structure is the most reliable field mark: Great-winged Petrel has a heavier, more robust bill compared to the slimmer bill of the Providence Petrel. Both species are similar in overall plumage, but subtle differences in structure can aid identification.

Identification tips

1. Bill Structure: Look for the heavier, more robust bill of the Great-winged Petrel compared to the slimmer bill of the Providence Petrel. 2. Overall Structure: Pay attention to subtle differences in structure rather than plumage, as both species appear similar in color.

Plumage

Both species have similar overall plumage, typically dark and uniform. Differences in plumage are not reliable for field identification.