Formerly considered conspecific with B. javensis by some, but combined study of vocalizations and museum specimens#R supported earlier suggestions that the two should be regarded as separate species. Recent suggestion that population of a small Batrachostomus frogmouth in Palawan (W Philippines) may be a race of present species is without foundation, as Palawan birds constitute race chaseni of B. javensis. Since 2005, several observations (and photographs) of a frogmouth on island of Siberut, off W Sumatra, perhaps involve this species or B. javensis, or alternatively an undescribed taxon#R#R; further study required. Has been suggested that birds from Borneo and Sumatra display consistent morphological differences that should be recognized taxonomically#R. Two subspecies recognized.
Food and feeding
Status and conservation
Only subscribers are able to see the bibliography. Login or Subscribe to get access to a lot of extra features!