Paíño Negro vs Paíño de Tristram

The Black Storm-Petrel and Tristram's Storm-Petrel can be distinguished by their wing and tail structure. The Black Storm-Petrel has long, pointed wings and a notched tail, while Tristram's Storm-Petrel shares similar wing and tail features but is noted for its lighter underparts.

Look for the lighter underparts of Tristram's Storm-Petrel when compared to the uniformly darker Black Storm-Petrel. Both species have long, pointed wings and notched tails, so focus on plumage differences.

Tristram's Storm-Petrel is characterized by lighter underparts compared to the Black Storm-Petrel.