The Freckle-breasted Thornbird is the eastern component of the Freckle-breasted/Spot-breasted species pair, which have been treated as conspecific in the past. Freckle-breasted Thornbirds are found in the Pampas region and part of the espinal forest of eastern Argentina. They take short, open and relatively dry forests or edge of riparian (gallery) forests. Often Hackberries (Celtis tala) are present in areas where this thornbird is found, the zig-zagging and thorny branches are perfect for creating their spiky, domed stick nests. Unlike most thornbirds, the Freckle-breasted does not hang the nest, but instead places it attached to a largely horizontal branch, or wedged in an upright fork. The nest is gourd-shaped, globular at one end and with a long entrance tunnel which curves up somewhat; the entrance itself twists so it is difficult to reach in and access the nest cup. The loud song of the Freckle-breasted Thornbird is given as a duet, and to the uninitiated may recall the duet of the Rufous Hornero (Furnarius rufus); that of the thornbird is more strident.