NT
Tamaulipas Pygmy-owl Glaucidium sanchezi



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions 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
2019 Near Threatened A2bc; B1b(ii,iii,iv,v)+2b(ii,iii,iv,v)
2016 Near Threatened B1ab(ii,iii,iv,v)
2015 Near Threatened B1ab(ii,iii,iv,v)
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 27,800 km2 medium
Area of Occupancy (breeding/resident) 500 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 20000-49999 mature individuals poor estimated 2017
Population trend decreasing - estimated -
Rate of change over the past 10 years/3 generations (longer of the two periods) 6-23% - - -
Generation length 3.8 years - - -

Population justification: Partners in Flight estimated the population to number fewer than 50,000 mature individuals (A. Panjabi in litt. 2017), thus it is placed in the band 20,000-49,999 mature individuals here.

Trend justification: Habitat loss through logging is known to occur within the species's range (König and Weick 2008); a remote sensing study found that forest was lost at a rate of 2% over three generations (11.4 years) between 2000 and 2012 within the species's range (Tracewski et al. 2016). Partners in Flight report a small or non-significant population decline since the 1970s (A. Panjabi in litt. 2017). Pronatura (2012) estimates that the population has declined by 15-49% in 30 years, which equates to a decline of 6-23% over three generations. Further research is needed to confirm the magnitude of the declines.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Mexico extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Mexico Tlanchinol y Bosques de Montaña del Noreste de Hidalgo

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 900 - 2100 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 Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Tamaulipas Pygmy-owl Glaucidium sanchezi. Downloaded from https://datazone.birdlife.org/species/factsheet/tamaulipas-pygmy-owl-glaucidium-sanchezi on 24/12/2024.
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 24/12/2024.