pia-cobra-do-sul vs mariquita-de-mascarilha

The Southern Yellowthroat and Common Yellowthroat can be distinguished by the male's head pattern: the Southern Yellowthroat has a gray crown extending rearward and downward behind the black mask, while the Common Yellowthroat's mask does not feature this gray extension. Both species have bright yellow underparts and olive upperparts.

Look for the gray crown extending behind the mask on Southern Yellowthroat males. Both species have similar yellow and olive coloration, so focus on head pattern differences.

Southern Yellowthroat males have a gray crown that extends behind the black mask, unlike the Common Yellowthroat. Both species share bright yellow underparts and olive upperparts.