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Range DescriptionZebrilus undulatus is a poorly known species of the Orinoco, Negro and Amazon basins. It occurs in east Colombia, where it is considered rare and local (del Hoyo et al. 1992). In bordering Venezuela there have been an increasing number of records, and the species may be locally common (Hilty 2003). From here, its range extends eastwards through Guyana to Suriname, French Guiana and north-central Brazil, and south-west to east Peru and north-west Bolivia (del Hoyo et al. 1992). It appears generally very rare, but has probably been significantly under-recorded due to its elusive nature and is likely to have a wider distribution than is currently known (Restall et al. 2006, A. Lees in litt. 2011).