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 Occurrence status Presence Resident Breeding Non-breeding Passage
Albania N Extant Yes
Bosnia and Herzegovina N Extant Yes
Bulgaria N Extant Yes
Chad N Extant Yes
Croatia N Extant Yes
Cyprus N Extant Yes
Egypt N Extant Yes
Eritrea N Extant Yes
Finland V Extant
Georgia U Extant
Greece N Extant Yes Yes
Hungary V Extant
Iran, Islamic Republic of N Extant Yes
Iraq V Extant
Ireland V Extant
Israel N Extant Yes
Italy N Extant Yes
Jordan N Extant Yes
Lebanon N Extant Yes Yes
Libya N Extant Yes
Malta N Extant Yes
Montenegro N Extant Yes
Netherlands V Extant
North Macedonia N Extant Yes
Norway V Extant
Oman V Extant
Palestine N Extant Yes
Romania N Extant Yes Yes
Saudi Arabia N Extant Yes
Serbia N Extant Yes
South Sudan V Extant
Sudan N Extant Yes
Syria N Extant Yes Yes
Tunisia N Extant Yes
Turkey N Extant Yes
Ukraine V Extant
United Arab Emirates V Extant
United Kingdom V Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Romania Hagieni forest
Greece National Park of Dadia - Lefkimi - Soufli forest
Greece Porto Lagos, lake Vistonida and coastal lagoons
Greece Filiouri valley and eastern Rodopi mountains
Greece Kompsatos valley
Greece Nestos delta and coastal lagoons
Greece Nestos gorge
Greece Central Rodopi mountains and Nestos valley
Greece Lake Kerkini
Greece Mount Beles (Kerkini)
Greece Mount Pangaio
Greece Mount Krousia (Mavrovouni and Dysoro)
Greece Mount Itamos
Greece Tzena and Pinovo mountains
Greece Prespa National Park and Varnountas mountains
Greece Lakes Cheimaditis and Zazari
Greece Mount Vourinos
Greece Central Zagori and mount Mitsikeli
Greece Kato Olympos, Tempi gorge and mount Ossa
Greece Mount Mavrovouni, Larisa
Greece Mount Othrys
Greece Mount Kantili
Greece Lefka Ori mountains, Crete
Greece Islands and islets of northern Sporades and northwestern coast of Alonnisos
Greece Nisyros island and surrounding islets
Greece Kythira island
Greece Mount Falakro
Greece Southwestern Lesvos and Petrified forest
Greece Mount Olympos and pine forest of central Lesvos
Greece South forest complex of Evros prefecture
Greece Dadia - Dereio - Aisymi forest
Serbia Derdap gorge
Croatia Mount Velebit
Jordan Dibbin Forest
Croatia Mount Ucka and Cicarija
Croatia Upper Drava River
Croatia Drava Storage Lakes

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 09/02/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 09/02/2023.