Habits
Gleans bark and foliage in mid to upper storey. Often forms mixed feeding flocks.
Voice
Song is a low-pitched four-note 'grrt-pu-put-pweet', thefirst note a short, quiet growl, the midle notes louder hoots and the last longest and upslurred. Also a resonant 'hwu-hu-hu', the first note higher. A short, mellow, evenly-pitched 'wup-wup-woo'.
Javan Scimitar Babbler (Pomatorhinus montanus) [XC166739]
by Ross Gallardy from Gunung Rinjani, above Senaru, Lombok, West Nusa Tenggara, Indonesia (song)
Javan Scimitar Babbler (Pomatorhinus montanus) [XC410373]
by Ross Gallardy from Licin, Kabupaten Banyuwangi, Jawa Timur, Indonesia (call)
Nest
Large, ball-shaped, composed of grasses and leaves.
Subspecies
May be close to White-browed Scimitar-babbler (Pomatorhinus schisticeps). Subspecies occidentalis and bornensis smaller and brighter than Javan ones, and study of differences, including vocal ones, required. Situation further complicated, however, by evidence that in Java and Sumatra, at least, upland birds are precocious, flocking and noisy, whereas lowland populations in Sumatra, Borneo and Peninsular Malaysia are skulking, unsociable and thought possibly to produce only the triple hooting call.
The following 4 subspecies are recognised:
occidentalis Robinson & Kloss, 1923 - Extreme southern Thailand, Peninsular Malaysia and Sumatra.
bornensis Cabanis, 1850 - Bangka I and Borneo.
montanus Horsfield, 1821 - Western and central Java.
ottolanderi Robinson, 1918 - Eastern Java and Bali.