Océanite de Wilson vs Océanite à queue fourchue

Wilson's Storm-Petrel and Fork-tailed Storm-Petrel can be distinguished by their plumage and tail shape. Wilson's Storm-Petrel is generally darker with a more uniform brownish-black coloration, while Fork-tailed Storm-Petrel has a distinctive bluish-gray tone and a forked tail.

1. Plumage Color: Look for the bluish-gray tone of the Fork-tailed Storm-Petrel compared to the darker, more uniform coloration of Wilson's Storm-Petrel. 2. Tail Shape: Note the forked tail of the Fork-tailed Storm-Petrel, which contrasts with the square tail of Wilson's Storm-Petrel.

Wilson's Storm-Petrel is predominantly dark brown to black, whereas Fork-tailed Storm-Petrel is notable for its bluish-gray plumage. This color difference is a key distinguishing feature.