Southern Bentbill (Oncostoma olivaceum) [XC273538]
by Kent Livezey from RNA El Paujil, Santander, Colombia (song)
Southern Bentbill (Oncostoma olivaceum) [XC31934]
by Ross Gallardy from Achiote Road, Col\u00f3n, Panama (song)
Subspecies
Has been suggested by some authors that genus be joined with closely affiliated Hemitriccus or Lophotriccus. However, bill morphology and peculiar voice viewed by others as sufficiently distinct to support retention of separate genus. Forms a superspecies with Northern Bentbill (Oncostoma cinereigulare), and sometimes considered conspecific.