polynesian storm-petrel vs mottled petrel

The Polynesian Storm-Petrel and Mottled Petrel can be distinguished primarily by their size and plumage patterns. The Polynesian Storm-Petrel is smaller with a more uniform dark plumage, while the Mottled Petrel is larger and exhibits a distinctive mottled gray and white pattern.

Look for the smaller size and uniform dark plumage of the Polynesian Storm-Petrel compared to the larger size and mottled pattern of the Mottled Petrel.

The Polynesian Storm-Petrel is smaller than the Mottled Petrel.

The Polynesian Storm-Petrel has a more uniform dark plumage, whereas the Mottled Petrel displays a mottled gray and white pattern.