Omani Owl Strix butleri


Taxonomic note
Strix butleri was previously listed as S. omanensis in del Hoyo and Collar 2014 based on the description under this name by Robb et al. (2013). S hadorami (Kirwan, Schweizer & Copete, 2015) was previously listed as S. butleri in del Hoyo and Collar (2014) and before.

Recent genetic and morphological analyses have revealed that the type specimen of S. butleri - the geographical provenance of which is open to doubt - differs significantly from all other specimens previously ascribed to this species, indicating (despite the lack of vocal data definitively linked to the same population as the type) that two species are involved, principally because the degree of molecular differentiation is close to that in other taxa of Strix traditionally recognised as species, which led to populations of this species from S Oman to the Levant and E Egypt, which share the same morphology and vocalizations, being described as a separate species, Desert Tawny Owl S. hadorami. 

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
- - -

Red List history
Year Category Criteria
2016 Data Deficient
2014 Data Deficient
Species attributes

Migratory status unknown Forest dependency Does not normally occur in forest
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 179,000
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals unknown 0
Population trend Unknown -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -

Population justification: The population size has not been quantified and further research is required.

Trend justification: The population trend has not been quantified and further research is required to assess this and potential threats to the species.

Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Iran, Islamic Republic of N Extant Yes
Oman N Extant Yes
Pakistan N Presence Uncertain Yes
United Arab Emirates N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
United Arab Emirates Wadi Wurayah National Park

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Rocky areas (eg. inland cliffs, mountain peaks) major resident
Shrubland Mediterranean-type Shrubby Vegetation major resident
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2018) Species factsheet: Strix butleri. Downloaded from http://www.birdlife.org on 19/11/2018. Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/11/2018.