Until very recently, Sucre Antpitta was universally treated as a subspecies of the wide-ranging Slate-crowned Antpitta (Grallaricula nana). A recent morphological and vocal study, however, emphasized the strong geographical variation evident within this species complex, and led to its division into two species. Sucre Antpitta is endemic to northeastern Venezuela in the region of the Paria Peninsula, where it is the only species of Grallaricula antpitta, which should facilitate identification for those observers fortunate enough to encounter the species. The plumage is largely rufous red below and dark brown above, with slate gray crown and nape, but getting a good view of these small antpittas is often a matter of considerable fortune. Sucre Antpitta inhabits the undergrowth of humid forest above 700 m elevation, and is almost certainly already threatened with extinction; it is currently afforded Vulnerable status. The eggs of Sucre Antpitta were described more than 45 years ago, but this remains the only published information on its reproductive habits. Its nest remains undescribed.