Balearic Warbler Curruca balearica


Taxonomic note
Sylvia sarda and S. balearica (del Hoyo and Collar 2016) were previously lumped as S. sarda following Cramp et al. (1977-1994) and Sibley and 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#.
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
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 13,000
Extent of Occurrence non-breeding (km2) 210,000
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 20000-49999 medium estimated 1990
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) 4 - - -

Population justification: In the early 1990s, the population was estimated to number 14,000-25,000 breeding pairs (del Hoyo et al. 2006), or 28,000-50,000 mature individuals. The population is suspected stable and therefore is likely to have remained in the band 20,000-49,999 mature individuals.

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

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Spain Cala Salada - Illa d'en Calders
Spain Tagomago island
Spain Salt-pans of Ibiza and Formentera and Freus isles
Spain La Mola of Formentera
Spain Dragonera Island-La Trapa
Spain Tramuntana mountains
Spain Cape Pinar
Spain Albufera de Mallorca and Albufereta de Pollença marshes
Spain Cape Freu-Cape Farrutx
Spain Salobrar de Campos Lagoons-Sa Vall
Spain Coastal cliffs between Cape Enderrocat and Cala Pí
Spain Coastal cliffs between isles of Malgrats and Cala Figuera
Spain Archipelago of Cabrera
Spain Cape Barbaria

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate suitable resident
Grassland Temperate suitable resident
Shrubland Mediterranean-type Shrubby Vegetation major resident
Altitude 0 - 1200 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Curruca balearica. Downloaded from on 08/12/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from on 08/12/2022.