The juvenile is similar, but its throat has a dirty look and faint dusky scales, its underparts are darker, and the breast and belly markings are fainter.

[3] Sumichrast's wren occurs in a small area of Mexico, from central Veracruz into northern Oaxaca.

[3] The diet of Sumichrast's wren is primarily arthropods and other invertebrates such as snails and worms, and also includes small fruit as a minor component.

It forages on and very near the ground with hops and short flights, probing into crevices for prey and occasionally snatching a flying insect that passes it.

[3] The male Sumichrast's wren sings "a varied descending series of loud, rich whistles" [1].