alegrinho-balança-rabo vs lavadeira-de-cara-branca

The Greater Wagtail-Tyrant and Black-backed Water-Tyrant can be distinguished primarily by their tail and back coloration. The Greater Wagtail-Tyrant has a more prominent tail wagging behavior, while the Black-backed Water-Tyrant features a distinct black back.

Look for the black back on the Black-backed Water-Tyrant. Observe the tail wagging behavior of the Greater Wagtail-Tyrant as a key behavioral cue.

The Greater Wagtail-Tyrant has a more uniform coloration with less contrast between the back and the rest of the body. In contrast, the Black-backed Water-Tyrant is characterized by its striking black back, which contrasts sharply with its white underparts.

The Greater Wagtail-Tyrant exhibits a characteristic tail wagging behavior, which is less pronounced in the Black-backed Water-Tyrant.