saí-andorinha vs saí-azul

The Swallow Tanager and Blue Dacnis can be distinguished by their structure and plumage. The Swallow Tanager has a more slender, swallow-like build with a longer tail, while the Blue Dacnis is more compact. Both species exhibit vibrant blue plumage, but the Swallow Tanager's blue is more uniform, whereas the Blue Dacnis has a contrasting black throat and face in males.

Look for the Swallow Tanager's slender build and longer tail. Note the uniform blue of male Swallow Tanagers versus the black throat and face of male Blue Dacnis. Female Swallow Tanagers are greenish, contrasting with the turquoise females of Blue Dacnis.

The Swallow Tanager has a more slender and elongated appearance compared to the more compact Blue Dacnis.

Male Swallow Tanagers are uniformly blue, while male Blue Dacnis have a distinctive black throat and face. Female Swallow Tanagers are greenish, whereas female Blue Dacnis are more turquoise.