LC
Western Bonelli's Warbler Phylloscopus bonelli



Taxonomy

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: http://www.aerc.eu/DOCS/Bird_taxa_of_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
2024 Least Concern
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 -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 3,380,000 km2
Extent of Occurrence (non-breeding) 4,100,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 6400000-8480000 mature individuals medium estimated 2018
Population trend increasing - suspected -
Generation length 2.02 years - - -

Population justification: In Europe, the total population size is estimated at 4,800,000-6,360,000 mature individuals, with 2,400,000-3,180,000 breeding pairs (BirdLife International 2021), and comprises approximately 75% of the species' global range, so a very preliminary estimate of the global population size is between 6,400,000-8,480,000 mature individuals, although further validation of this estimate is desirable. The species' population in Europe is considered to have undergone a rapid increase over three generations (10 years) (BirdLife International 2021). As this region holds the vast majority of the species' global range, the global population size is considered to be increasing over three generations.

Trend justification:    .


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Algeria extant native yes
Andorra extant native yes
Austria extant native yes
Belgium extant native yes
Benin extant native yes
Burkina Faso extant native yes
Cameroon extant native yes
Chad extant native yes
Côte d'Ivoire extant native yes
Czechia extant native yes
Denmark extant vagrant
Finland extant vagrant
France extant native yes
Gabon extant vagrant
Gambia extant native yes
Germany extant native yes
Ghana extant native yes
Gibraltar (to UK) extant native yes
Guinea extant native yes
Guinea-Bissau extant native yes
Hungary extant vagrant
Ireland extant vagrant
Italy extant native yes yes
Latvia extant vagrant
Libya extant native yes
Liechtenstein extant native yes
Mali extant native yes
Malta extant native yes
Mauritania extant native yes
Morocco extant native yes
Netherlands extant native yes
Niger extant native yes
Nigeria extant native yes
Norway extant vagrant
Poland extant native yes
Portugal extant native yes
Senegal extant native yes
Slovakia extant vagrant
Slovenia extant native yes
Spain extant native yes
Sweden extant vagrant
Switzerland extant native yes
Togo extant native yes
Tunisia extant native yes
United Kingdom extant vagrant
Western Sahara extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Austria Karwendel
Austria Tyrolian Lech valley
Germany Ammergau mountains
Germany Karwendel and Karwendel foothills

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry suitable non-breeding
Forest Temperate suitable breeding
Grassland Subtropical/Tropical Dry suitable non-breeding
Savanna Dry suitable non-breeding
Shrubland Mediterranean-type Shrubby Vegetation suitable breeding
Shrubland Subtropical/Tropical Dry suitable non-breeding
Wetlands (inland) Freshwater Springs and Oases suitable non-breeding
Altitude 0 - 2000 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2024) Species factsheet: Western Bonelli's Warbler Phylloscopus bonelli. Downloaded from https://datazone.birdlife.org/species/factsheet/western-bonellis-warbler-phylloscopus-bonelli on 14/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 14/12/2024.