Southern Bentbill (Oncostoma olivaceum) [XC455599]
by id from Metropolitan Park, Panama city, Panama (call)
Southern Bentbill (Oncostoma olivaceum) [XC226895]
by Peter Boesman from Darien Cana, 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.