These upland forests are of a scrubby character and are called catingas.
To the south, hedges are mainly scrubby, with occasional mature willows.
From behind, one could hear yellowhammers singing on the scrubby areas across the road.
The pampas, which cover so large a part of the republic, have no native trees whatever, and no woods except the scrubby growth of the delta islands of the Parana., and a fringe of low thorn-bushes along the Atlantic coast south to Mar Chiquita and south of the Tandil sierra, which, strictly speaking, does not belong to this region.
The scrubby vegetation that has grown up around the site provides the ideal conditions for these rather elusive birds.