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CR
Cozumel Thrasher Toxostoma guttatum

IUCN Red List Criteria

Critically Endangered B1ab(i,ii,iii,iv,v);C2a(i,ii);D 
Endangered B1ab(i,ii,iii,iv,v);C2a(i,ii);D 
Vulnerable B1ab(i,ii,iii,iv,v);C2a(i,ii);D1+2 

IUCN Red List history

Year Category
2012 Critically Endangered
2010 Critically Endangered
2009 Critically Endangered
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1994 Lower Risk/Near Threatened
1988 Lower Risk/Least Concern

Species attributes

Migratory status not a migrant Forest dependency High
Land mass type   Average mass 52.8 g

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 25 medium
Number of locations 1 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1-49 poor Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 1-50 - - -
Generation length (yrs) 4.2 - - -
Population justification: Any remaining population is assumed to be tiny (numbering fewer than 50 individuals and mature individuals), given the low number of records during the past decade.
Trend justification: The species is suspected to have declined extremely rapidly around the time of Hurricane Gilbert in 1988. Since 1994-1995, when just four records were obtained from monthly survey visits, it has apparently had a tiny population which has remained so and may have continued to decline. The population is suspected to have experienced a 1-19% decline over the last ten years.

Country/Territory distribution

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

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Shrubland Subtropical/Tropical Moist major resident
Altitude 0 - 0 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation
Climate change & severe weather Storms & flooding Timing Scope Severity Impact
Ongoing Whole (>90%) Very Rapid Declines High Impact: 9
Stresses
Ecosystem degradation, Species mortality
Invasive and other problematic species, genes & diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) Boa constrictor (Boa constri Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Species mortality
Residential & commercial development Tourism & recreation areas Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Toxostoma guttatum. Downloaded from http://www.birdlife.org on 28/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 28/08/2014.

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 Critically Endangered
Family Mimidae (Mockingbirds and thrashers)
Species name author (Ridgway, 1885)
Population size 1-49 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 25 km2
Country endemic? Yes
Links to further information
- Summary information on this species