Chocolate Boobook (Ninox randi) [XC321148]
by id from PICOP, Bislig, Mindanao, Philippines (call)
Chocolate Boobook (Ninox randi) [XC68869]
by Frank Lambert from Negros; Mt. Canlaon, Philippines (song)
Subspecies
Ninox scutulata (Sibley and Monroe 1990, 1993) was split into Brown Hawk-Owl (Ninox scutulata), Chocolate Boobook (Ninox randi) and Northern Boobook (Ninox japonica) by King (2002), but this treatment is not adopted by the BirdLife Taxonomic Working Group because although King (2002) provides good evidence of consistent vocal differences in three groups within the Ninox scutulata complex, he also shows there are no clear matching morphological differences.
Considered by some authors to be a subspecies of Brown Hawk-Owl (Ninox scutulata).