Family Typical Owls (Strigidae)

Least Concern

Javan Owlet (Glaucidium castanopterum)


French: Chevêchette spadicée German: Trillerzwergkauz Spanish: Mochuelo de Java

Strix castanoptera


, 1821,



This and some other Old World owlet species placed in genus Taenioglaux by some recent authors#R#R. Possibly closest to G. cuculoides, with which formerly treated as an isolated race. Monotypic.


Java and Bali.

Descriptive notes

23–25 cm; no data on body mass. Largish owlet with no “false eyes” on nape, indistinct facial disc barred with rufous and orange-yellow; eyebrows white;... read more


Male’s vocalisation a series of short trills that drop in pitch and increase... read more


Dense primary and secondary forest, from lowlands to c. 900 m, in some areas (e.g. Mt Papandajan)... read more

Food and feeding

Feeds mostly on invertebrates such as beetles, grasshoppers, crickets, mantids, cockroaches, spiders, scorpions and centipedes; less... read more


Little information available. Breeding occurs from at least Feb–Apr; two "slightly incubated" eggs collected in W Java on 4... read more


Presumably resident.

Status and conservation

Not globally threatened (Least Concern). CITES II. Considered rare to locally common in forest fragments and hills. No global population estimate, and little information... read more

Recommended citation

Holt, D.W., Berkley, R., Deppe, C., Enríquez Rocha, P., Petersen, J.L., Rangel Salazar, J.L., Segars, K.P., Wood, K.L. & Marks, J.S. (2019). Javan Owlet (Glaucidium castanopterum). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 14 December 2019).