Distribution. Idioneurula donegani is known only from Serranía de los Yariguíes, in páramo habitat at
2900–3200m elevation. Idioneurula erebioides is found at similar elevations (2250–3200m) but in the main
East Andes and ranges further south (Cundinamarca to Boyacá: found at Arcabuco, SFF Iguaque, Sierra
Nevada del Cocuy and Bogotá region). I. erebioides and I. donegani are not known to be sympatric (Fig. 1).
On the north-eastern slope of the Cordillera Oriental in the region of Tamá, Tamania jacquelinae (2200–
2500m) and Idioneurula eremita (2400–3350m) are found, with the latter replacing the former at higher elevations
(Pyrcz 1995; Viloria 1998). Idioneurula donegani has not been found in the main range of the East
Andes, suggesting that it may be endemic to Serranía de los Yariguíes. The páramo habitats of the Yariguíes
are isolated from others in the northern East Andes by a dry region of lower elevation in the valleys of the rivers
Chicamocha and Suárez and by depressions associated with the ríos Horta and Opón. The isolation of the
Yariguíes páramo systems possibly may have led to differentiation of high elevation taxa such as I. donegani.
Several endemic undescribed bird taxa were also found in the Yariguíes páramo (Donegan et al. 2007).