LC
Brown-headed Nuthatch Sitta pusilla



Taxonomy

Taxonomic note
Sitta pusilla and S. insularis (del Hoyo and Collar 2016) were previously lumped as S. pusilla following AOU (1998 & supplements), Sibley & Monroe (1990, 1993) and Stotz et al. (1996).

Taxonomic source(s)
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
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Average mass 10.19999981 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,710,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
Population trend Decreasing 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 - - -
Largest subpopulations - - -
Generation length (yrs) 4 - - -

Trend justification: Analyses of trend data from the North American Breeding Bird Survey suggest a 24% decline between 1966 and 2013 (Sauer et al. 2014). However, analyses of the trend between 2003 and 2013 shows only a non-significant decline of 0.2% per year during that time period (Sauer et al. 2014).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Turks and Caicos Islands (to UK) N Extant Yes
USA N Extant Yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Swamp suitable resident
Altitude   Occasional altitudinal limits (max) 670 m

Recommended citation
BirdLife International (2017) Species factsheet: Sitta pusilla. Downloaded from http://www.birdlife.org on 12/12/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 12/12/2017.