This wren occurs only in Zapata Swamp in southwestern Cuba. It has a long tail and bill, builds a grass nest, and eats a varied range of small animals and other foods.
It has a blackish crown, brown upperparts barred with black, brownish-white underparts, and a long tail and bill.
Both adults build a ball-shaped nest of sawgrass leaves with a side entrance, but the female alone incubates the eggs. Its varied diet includes insects, spiders, seeds, snails, lizards, and frogs.
An extinction-risk assessment has not been added yet.