Ninox ios 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Strigiformes Strigidae

Scientific Name: Ninox ios Rasmussen, 1999
Common Name(s):
English Cinnabar Boobook, Cinnabar Boobook
Taxonomic Source(s): Rasmussen, P. C. 1999. A new species of Hawk-owl (Ninox) from North Sulawesi, Indonesia. Wilson Bulletin 111: 457-464.
Identification information: c.22 cm. Small, brightly coloured hawk-owl. Uniform rufous-chestnut but for whitish scapular spots, whitish feather shafts on underparts, indistinct darker scalloping to lower underparts, and narrow, darker bars on retrices. Lacks any facial patterning. Similar spp. Speckled Hawk-owl N. punctulata, Brown Hawk-owl N. scutulata and Ochre-bellied Hawk-owl N. ochracea are larger with more prominently patterned faces. N. punctulata is spotted white on upperparts and barred white on underparts, N. ochracea and N. scutulata are dark brown, the former with paler yellow-ochre lower underparts, the latter with brown-streaked white underparts.

Assessment Information [top]

Red List Category & Criteria: Vulnerable C2a(i) ver 3.1
Year Published: 2017
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Bishop, K.D., Hutchinson, R. & King, B.
Facilitator/Compiler(s): Allinson, T, Benstead, P., Bird, J., Taylor, J., Tobias, J., Westrip, J.
Assessment of the status of this species is hampered by its considerable obscurity. Given its apparent rarity and the continuing loss and degradation of forest habitat on Sulawesi, it seems reasonable to surmise that its population is small and declining, qualifying it as Vulnerable.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Ninox ios is apparently restricted to the highlands of Sulawesi, Indonesia (BirdLife International 2001). Since the collection of the type specimen in Bogani Nani Wartabone National Park in 1985, there have been records from Gunung Ambang Strict Nature Reserve and from Lore Lindu National Park (Central Sulawesi), where it may be fairly common (Mauro 2001, King 2005, Hutchinson et al. 2006, eBird 2017, B. King and R. Hutchinson in litt. 2012); although elsewhere it could be sparsely distributed (K. D. Bishop in litt. 2012).

Countries occurrence:
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:44000
Continuing decline in extent of occurrence (EOO):YesExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):1200
Upper elevation limit (metres):1700
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population size is preliminarily estimated to fall into the band 2,500-9,999 mature individuals. This equates to 3,750-14,999 individuals in total, rounded here to 3,500-15,000 individuals.

Trend Justification:  Deforestation has occurred at lower elevations within the species's range. This on-going threat suggests that its population is declining, although the rate of decline is suspected to be moderate owing to limited impacts on montane forests.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:2500-9999Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:2-100Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No
No. of individuals in largest subpopulation:1-89

Habitat and Ecology [top]

Habitat and Ecology:The known records (including that of the type specimen) are from forest between 1,120 m and 1,700 m, and it is assumed that the species is sympatric with, but probably at higher elevations than, the Ochre-bellied Hawk-owl N. ochracea (Hutchinson et al. 2006), and N. punctulata (in Lore Lindu [B. King in litt. 2012]). Observations and comparison with owlet-nightjars (Aegothelidae) suggests that the species feeds predominantly on flying insects by conducting short sallies from exposed branches (Hutchinson et al. 2006).

Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):4.1
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): Forest at middle elevations on Sulawesi is relatively intact at present. However, deforestation is having a major impact in many areas, and until it is demonstrated that the species occurs more widely than its current three localities, it is precautionary to regard it as at risk simply on the basis of its potentially restricted population. The drivers behind on-going deforestation are thought to be rural development and encroachment of settlements, agricultural expansion and logging pressure. Oil palm plantations are a major cause of deforestation in many parts of Indonesia. As a species of montane areas, it is potentially at risk from the effects of projected climate change on the distribution and extent of its habitats.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CITES Appendix II. The species occurs within three protected areas: Bogani Nani Wartabone National Park, Gunung Ambang Strict Nature Reserve and Lore Lindu National Park.

Conservation Actions Proposed
Establish the calling periods of this species as a prerequisite to full surveys using playback, by which its true status and needs can be determined. Provide full support for the management and protection of protected areas where it is known to occur. Assess the threats to higher elevation forest on Sulawesi and take appropriate actions to conserve these areas.

Amended [top]

Amended reason: Edited text of Geographic Range Information and Habitats and Ecology Information, with subsequent addition of a new reference and an alteration of upper elevation limit. Also added Contributors and a Facilitator/Compiler.

Citation: BirdLife International. 2017. Ninox ios (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T22728610A110052073. . Downloaded on 20 June 2018.
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