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Sierra Madre Sparrow Xenospiza baileyi

IUCN Red List Criteria

Critically Endangered  
Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) 
Vulnerable A2bc+3bc+4bc;B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) 

IUCN Red List history

Year Category
2012 Endangered
2008 Endangered
2007 Endangered
2004 Endangered
2000 Endangered
1996 Endangered
1994 Endangered
1988 Threatened

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 70 medium
Area of Occupancy breeding/resident (km2) 9 good
Number of locations 2 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 2500-9999 good Estimated 2007
Population trend Decreasing medium -
Number of subpopulations 2 - - -
Largest subpopulation 1001-10000 - - -
Generation length (yrs) 3.8 - - -
Population justification: The population is estimated to number 2,500-9,999 mature individuals, based on a 1997 estimate of 5,380-6,150 adults occupying the key site for this species. There were reportedly a small number of individuals at other locations. This estimate equates to 3,750-14,999 individuals in total, rounded here to 3,500-15,000 individuals. Densities of 2.9 territories/ha have been recorded at La Cima (Oliveras de Ita et al. 2001).
Trend justification: Global population trends have not been accurately estimated but the area of suitable habitat at the principal site for the species, where over 90% of the global population occurs, has declined by c. 50% in the last 10 years. In addition the species has disappeared from three out of four historic localities in the north of its range (Oliveras de Ita and Gómez de Silva 2007). Overall, the species is estimated to be declining rapidly.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Mexico Native Extant       Yes

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Mexico Sur del Valle de México site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland major non-breeding
Grassland Subtropical/Tropical High Altitude major resident
Shrubland Subtropical/Tropical High Altitude major resident
Altitude 2800 - 3050 m Occasional altitudinal limits (min) 2400 m

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Agro-industry farming Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching / Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Whole (>90%) Rapid Declines High Impact: 8
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Gathering terrestrial plants / Unintentional effects (species is not the target) Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Decline Medium Impact: 7
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Problematic native species/diseases / Unspecified species Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Reduced reproductive success
Pollution Agricultural & forestry effluents / Type Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Decline Medium Impact: 7
Stresses
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Very Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Xenospiza baileyi. Downloaded from http://www.birdlife.org on 21/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/12/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Endangered
Family Emberizidae (Buntings, American sparrows and allies)
Species name author Bangs, 1931
Population size 2500-9999 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 70 km2
Country endemic? Yes
Links to further information
- Summary information on this species