Endemic to the coastal marshes of northeast Mexico, the Altamira Yellowthroat is currently listed as Vulnerable on account of ongoing habitat degradation and loss within its comparatively small and patchy range, although at least locally the species is still fairly common. Males possess yellow-olive upperparts, a yellow crown bordering the black mask, and bright yellow underparts, washed dusky olive over the flanks. Females, like those of all Geothlypis, lack the mask, and instead have a yellow face with olive ear-coverts. Basic life history information for this species is very limited, which must further hamper efforts to conserve the Altamira Yellowthroat. The species’ takes its unusual vernacular name from that of the type locality.