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Range DescriptionHeliangelus zusii is known from a single trade-skin purchased in 1909 in Bogot, and speculated to have been collected on the East Andes or possibly the Central Andes of Colombia, within a few hundred kilometres of the capital. However, some "Bogot" specimens came from as far away as Ecuador (F.G. Stiles in litt. 1999), and a recent reassessment (Kirchman et al. 2009) suggests that the species might have originated in humid or semi-arid habitat anywhere from northwestern Venezuela to northern Peru up to 3,200 m. Since no other specimen is known, it is assumed to be (or have been) a species of restricted range. Much habitat in the Colombian East and Central Andes has been extensively degraded, particularly within the lower limits of this species's presumed elevational range. However, its probable habitat preferences suggest that it is not inconceivable that a remnant population may persist. The validity of this taxon is sometimes questioned (e.g. F.G. Stiles in litt. 1999), but DNA sequencing supports its recognition as a valid taxon (Kirchman et al. 2009).