Voice
A prolonged series of barbet-like whistles, 'hoop hoop hoop wup-wup-wup pupupupupu' and a quavering trill, increasing steadily in volume, 'wu u u u u u u u'. Also various squawks, barks and churrs.
Asian Barred Owlet (Glaucidium cuculoides) [XC426586]
by Peter Boesman from Nameri Eco Camp, Assam, India (call, song, song and call)
Asian Barred Owlet (Glaucidium cuculoides) [XC200667]
by Marc Anderson from C\u00e1t Ti\u00ean National Park, T\u00e2n Ph\u00fa, Dong Nai, Vietnam (song)
Subspecies
Possibly forms superspecies with Javan Owlet (Glaucidium castanopterum). Sometimes considered to include Javan Owlet (Glaucidium castanopterum) and Chestnut-backed Owlet (Glaucidium castanotum) as subspecies.
The following 8 subspecies are recognised:
cuculoides (Vigors, 1831) - Himalayas from north-eastern Pakistan and Kashmir east to western Sikkim.