Sri Lanka Grey Hornbill Ocyceros gingalensis


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
2020 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status altitudinal migrant Forest dependency High
Land mass type Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 71,900
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Stable 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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 5.54 - - -

Population justification: The global population size has not been quantified, but the species is reported to be locally common (del Hoyo et al. 2001). Surveys were carried out in one district in Sri Lanka in 2014 and 2015 (Wickramasinghe et al. 2018), which showed higher presence and distribution within non-forested habitats such as gardens and remnant forest patches. However population or density estimates are not available.

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Sri Lanka Ayagama
Sri Lanka Beraliya-Akurassa
Sri Lanka Bodhinagala
Sri Lanka Delgoda / Kudumiriya / Kobahadukanda
Sri Lanka Dellawa / Diyadawa
Sri Lanka Delmella
Sri Lanka Delwela / Panilkanda / Walankanda
Sri Lanka Gilimale-Eratna
Sri Lanka Kalugala
Sri Lanka Kithulgala
Sri Lanka Knuckles Range (Knuckles IBA)
Sri Lanka Kombala-Kottawa
Sri Lanka Labugama
Sri Lanka Morapitiya-Runakanda
Sri Lanka Mulatiyana
Sri Lanka Nakiyadeniya / Kanneliya / Dediyagala
Sri Lanka Neugalkanda
Sri Lanka Peak Wilderness Sanctuary
Sri Lanka Rammalkanda
Sri Lanka Morningside and Handapan Ella Plains (Sinharaja IBA)
Sri Lanka Welihena
Sri Lanka Yagirala
Sri Lanka Sigiriya
Sri Lanka Ampara
Sri Lanka Madura Oya
Sri Lanka Kantale Tank
Sri Lanka Senanayake Samudraya / Nilgala
Sri Lanka Padaviya
Sri Lanka Minneriya / Girithale / Kaudulla
Sri Lanka Polonnaruwa
Sri Lanka Wasgomuwa

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Artificial/Terrestrial Rural Gardens major resident
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 1200 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Ocyceros gingalensis. Downloaded from on 16/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from on 16/08/2022.