Eastern Bonelli's Warbler Phylloscopus orientalis


Taxonomic note
Phylloscopus bonelli and P. orientalis (del Hoyo and Collar 2016) were previously lumped as P. bonelli following Cramp et al. (1977-1994), Dowsett & Forbes-Watson (1993) and Sibley & Monroe (1990, 1993).

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: # _the_WP15.xls#.
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: # _the_WP15.xls#.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and 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 Least Concern
2012 Not Recognised
2008 Not Recognised
2005 Not Recognised
2004 Least Concern
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status full migrant Forest dependency low
Land mass type Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,900,000
Extent of Occurrence non-breeding (km2) 1,300,000
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 30000-80000 poor estimated 0
Population trend increasing estimated -
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) 3.6 - - -

Population justification: The global population is estimated at c.1% of that of P. bonelli (del Hoyo et al. 2006), putting it at 30,000-80,000 mature individuals.

Trend justification: In Europe the overall trend from 1980-2011 was increasing, based on provisional data for 27 countries from the Pan-European Common Bird Monitoring Scheme (EBCC/RSPB/BirdLife/Statistics Netherlands).

Country/territory distribution
Country/Territory Presence Origin Resident Breeding Non-breeding Passage
Albania extant native yes
Bosnia and Herzegovina extant native yes
Bulgaria extant native yes
Chad extant native yes
Croatia extant native yes
Cyprus extant native yes
Egypt extant native yes
Eritrea extant native yes
Finland extant vagrant
Georgia extant uncertain
Greece extant native yes yes
Hungary extant vagrant
Iran, Islamic Republic of extant native yes
Iraq extant vagrant
Ireland extant vagrant
Israel extant native yes
Italy extant native yes
Jordan extant native yes
Lebanon extant native yes yes
Libya extant native yes
Malta extant native yes
Montenegro extant native yes
Netherlands extant vagrant
North Macedonia extant native yes
Norway extant vagrant
Oman extant vagrant
Palestine extant native yes
Romania extant native yes yes
Saudi Arabia extant native yes
Serbia extant native yes
South Sudan extant vagrant
Sudan extant native yes
Syria extant native yes yes
Tunisia extant native yes
Turkey extant native yes
Ukraine extant vagrant
United Arab Emirates extant vagrant
United Kingdom extant vagrant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry suitable non-breeding
Forest Temperate major breeding
Savanna Dry suitable non-breeding
Shrubland Subtropical/Tropical Dry suitable non-breeding
Altitude 800 - 1800 m Occasional altitudinal limits (min) 200 m

Recommended citation
BirdLife International (2023) Species factsheet: Phylloscopus orientalis. Downloaded from on 30/05/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 30/05/2023.