Though birds in the northern part of its range are larger, the difference is too small to assign geographical subspecies.

[3] The giant wren was formerly considered endemic to Mexico's Chiapas state, from Puerto Arista south to near the Guatemalan border.

It inhabits bushland including areas much modified by humans such as farmyards, hedgerows, and fruit orchards.

The nest is a bulky ball with a side entrance, constructed of straw and other coarse fiber and often placed in an acacia tree.

[3] Giant wren pairs sing in unison, "rhythmic hollow phrases, chortling and rollicking" [1].