LC
Diademed Amazon Amazona diadema



Taxonomy

Taxonomic note
Amazona autumnalis, A. diadema and A. lilacina (del Hoyo and Collar 2014) were previously lumped as A. autumnalis following Sibley and Monroe (1990, 1993).

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
2020 Least Concern
2016 Endangered A4cd
2014 Endangered A4cd
2012 Not Recognised
2008 Not Recognised
2006 Not Recognised
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 289,000
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 30000-74000 poor suspected 2020
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 10-19 - - -
Decline (10 years/3 generation past and future) 10-19 - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 11.7 - - -

Population justification: There is no direct data on the species's population size. Based on density estimates of congeners (first quartile and median: 2 and 3 individuals per km2), the area of tree cover with at least 50% canopy cover within the species's mapped range in 2020 (91,460 km2; Global Forest Watch 2020) and assuming 25-40% of forest within the species's range is occupied, the population size is tentatively suspected to fall within the range 46,000 - 110,000 individuals, roughly equating to 30,000 - 74,000 mature individuals.

Trend justification: Based on remote-sensed data showing a small amount of deforestation within the species's range since 2000 (Global Forest Watch 2020), the species is inferred to be declining. Four percent of forest with at least 50% canopy was lost within the species's range between 2001 and 2019 (Global Forest Watch 2020). Assuming a similar rate over the past three generations, this would equate to a reduction of around 8% over 35 years. Rates of deforestation in the Brazilian Amazon were higher before the mid-2000s, so the average rate of deforestation over the past 35 years may have been greater than that inferred from loss since 2000, but the area where the species is found has not been subjected to high levels of deforestation and retained 89% tree cover in 2010 (Global Forest Watch 2020). The species is found in modified habitats so it may not have declined at the same rate as the forest. However, the species is assumed to experience some trapping pressure, so is suspected to have declined by 5-15% over the past three generations.

Between 2016 and 2019, approximately 1.4% of forest was lost within the species's range within four years (Global Forest Watch 2020). If this rate were to continue, on average, over the next three generations (35 years), this would amount to a total loss of 12% of forest. The species is suspected to undergo a population reduction of 10-19% over the three generations from 2016, and over the next three generations.


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

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland suitable resident
Artificial/Terrestrial Plantations suitable resident
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable resident
Forest Subtropical/Tropical Moist Lowland major resident
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Reduced reproductive success, Species mortality
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
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Amazona diadema. Downloaded from http://www.birdlife.org on 05/12/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 05/12/2022.