Steve
Wednesday 10th December 2003, 14:14
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Javan Scops-owl (Otus angelinae)
Justification This small owl qualifies for Vulnerable because its small range is undergoingcontraction and increasing fragmentation through habitat loss, a factor that implies reductions in its small population. However, its silent, nocturnal habits and unobtrusive behaviour may have resulted in it being consistently under-recorded. Additional locality records and population data may require a reassessment of its threat status.
Identification 16-18 cm. Small, rufous-brown, forest-dwelling owl. Rusty-brown facial disc, with prominent white eyebrows extending into ear-tufts. Rufous-brown upperparts, often with buffy or whitish (and distinctly black-tipped) collar and whitish scapular stripe. Whitish or creamy underparts. Golden-yellow iris. Similar spp. Sunda Scops-owl O. lempiji is slightly larger with generally greyer facial disc, buffy eyebrows, brown or orange iris and different call. Voice Usually silent, but gives explosive poo-poo in alarm and (especially young birds) prolonged hissing contact note. Hints Possibly most easily found by listening for hissing or wailing of fledglings.
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Range & Population Otus angelinae is endemic to the island of Java, Indonesia, where it is currently known from seven mountains, with recent records from only three. A recent evaluation of records and museum/zoo specimens, coupled with its reputed silence, suggests it may be more numerous and widespread than available evidence shows.
Ecology It inhabits tropical upper montane forest between 1,000 m and 2,000 m. Observations suggest a breeding territory size of very roughly 50 ha. Fledged young have been recorded in February, June and July, indicating egg-laying in at least May and December. It is presumed to be resident, perhaps making some altitudinal movements.
Threats The main threat is from forest loss, degradation and fragmentation through widespread agricultural encroachment by shifting cultivators. Localised development (e.g. for holiday resorts and geothermal projects) is probably becoming an increasing threat in the lower part of its altitudinal range (1,000-1,500 m), particularly on unprotected mountain slopes. The area above this zone is still relatively secure
Javan Scops-owl (Otus angelinae)
Justification This small owl qualifies for Vulnerable because its small range is undergoingcontraction and increasing fragmentation through habitat loss, a factor that implies reductions in its small population. However, its silent, nocturnal habits and unobtrusive behaviour may have resulted in it being consistently under-recorded. Additional locality records and population data may require a reassessment of its threat status.
Identification 16-18 cm. Small, rufous-brown, forest-dwelling owl. Rusty-brown facial disc, with prominent white eyebrows extending into ear-tufts. Rufous-brown upperparts, often with buffy or whitish (and distinctly black-tipped) collar and whitish scapular stripe. Whitish or creamy underparts. Golden-yellow iris. Similar spp. Sunda Scops-owl O. lempiji is slightly larger with generally greyer facial disc, buffy eyebrows, brown or orange iris and different call. Voice Usually silent, but gives explosive poo-poo in alarm and (especially young birds) prolonged hissing contact note. Hints Possibly most easily found by listening for hissing or wailing of fledglings.
http://www.birdlife.info/wbdbweb/images/speciesmap/2000-2168.gif
Range & Population Otus angelinae is endemic to the island of Java, Indonesia, where it is currently known from seven mountains, with recent records from only three. A recent evaluation of records and museum/zoo specimens, coupled with its reputed silence, suggests it may be more numerous and widespread than available evidence shows.
Ecology It inhabits tropical upper montane forest between 1,000 m and 2,000 m. Observations suggest a breeding territory size of very roughly 50 ha. Fledged young have been recorded in February, June and July, indicating egg-laying in at least May and December. It is presumed to be resident, perhaps making some altitudinal movements.
Threats The main threat is from forest loss, degradation and fragmentation through widespread agricultural encroachment by shifting cultivators. Localised development (e.g. for holiday resorts and geothermal projects) is probably becoming an increasing threat in the lower part of its altitudinal range (1,000-1,500 m), particularly on unprotected mountain slopes. The area above this zone is still relatively secure