Males have a black face mask and yellow underparts; females have an olive face without the mask. A wetland survey documented the remaining populations in central Mexico.
Males have brownish-olive upperparts, a black face mask and yellow underparts, with an orange chest. Females lack the black mask and have a pale eye-ring and buff supercilium.
It lives in freshwater lake-edge and river marshes with reeds and bulrushes, gleaning insects from cattails and other low vegetation.
An extinction-risk assessment has not been added yet.