EN
Forest Owlet Heteroglaux blewitti



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- C2a(i) C2a(i); D1+2

Red List history
Year Category Criteria
2017 Endangered C2a(i)
2016 Critically Endangered C2a(i)
2015 Critically Endangered C2a(i)
2013 Critically Endangered C2a(i)
2012 Critically Endangered C2a(i)
2010 Critically Endangered C2a(i)
2009 Critically Endangered C2a(i)
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 55,300 medium
Number of locations 2-5 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor estimated 2005
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 10-19 - - -
Decline (10 years/3 generation past and future) 10-19 - - -
Number of subpopulations 2-100 - - -
Largest subpopulations - - -
Generation length (yrs) 5.4 - - -

Population justification: The population size was previously listed as 50-249 mature individuals based on the number of records from known sites. However, as more surveys are conducted more individuals are being found at more sites, e.g. its recent reporting from Gujarat (Patel et al. 2015) and there were 53 sightings from new localities during surveys in Melghat Tiger Reserve, although only 19 were found from known localities there (Kasambe et al. 2015). More than 100 individuals have been recorded at Melghat Tiger Reserve (Kasambe et al. 2005), at least 82 individuals have now been recorded in Dang District, Gujarat (Patel et al. 2017), and 42 individuals were recorded in Tansa Wildlife Sanctuary during surveys between 2014-2016 (Laad et al. 2016). Given the increasing number of reports of this species it is likely that the global population size is likely to be >250 mature individuals, and so it is now placed in the range of 250-999 mature individuals.

Trend justification: The species faces a number of threats, the most serious of which are believed to be forest loss and degradation as a result of illegal logging and human encroachment, as well as forest fires and minor irrigation dams. In combination these threats are suspected to be causing a slow ongoing population decline over three generations (16 years).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
India N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
India Melghat Tiger Reserve
India Taloda Reserve Forest
India Toranmal Reserve Forest

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Altitude 200 - 700 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Whole (>90%) Negligible declines Medium Impact: 6
Stresses
Competition, Species mortality
Natural system modifications Dams & water management/use - Large dams Timing Scope Severity Impact
Future Minority (<50%) Slow, Significant Declines Low Impact: 3
Stresses
Species disturbance, Ecosystem degradation, Ecosystem conversion
Natural system modifications Dams & water management/use - Small dams Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance, Ecosystem degradation, Ecosystem conversion
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance, Ecosystem degradation, Ecosystem conversion
Pollution Agricultural & forestry effluents - Herbicides and pesticides Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance, Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Other household goods - - Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2017) Species factsheet: Heteroglaux blewitti. Downloaded from http://www.birdlife.org on 12/12/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 12/12/2017.