Northern Bentbill (Oncostoma cinereigulare) [XC82665]
by Mayron McKewy Mej\u00eda from Parque Nacional El Imposible, El Salvador, El Salvador (song)
Northern Bentbill (Oncostoma cinereigulare) [XC880196]
by Peter Boesman from PN Tikal, Pet\u00e9n, Guatemala (call)
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 Southern Bentbill (Oncostoma olivaceum), and sometimes considered conspecific. Distribution somewhat uncertain.