Petrel de Jouanin vs Pardela Tropical

Jouanin's Petrel and Tropical Shearwater can be confused due to their similar dark plumage, but key differences include size and tail shape. Jouanin's Petrel has a long wedge-shaped tail, while Tropical Shearwater is smaller with a more typical shearwater tail.

Look for the long wedge-shaped tail of Jouanin's Petrel as a primary distinguishing feature. Note the size difference, with Jouanin's Petrel being larger and bulkier than the Tropical Shearwater.

Jouanin's Petrel is larger with a heavier build compared to the smaller Tropical Shearwater.

Both species are dark, but Jouanin's Petrel is sooty-brown to blackish-brown with a weak pale bar on the upperwing-coverts.