LC
Greater Scythebill Drymotoxeres pucheranii



Taxonomy

Taxonomic note

Drymotoxeres pucheranii (del Hoyo and Collar 2016) was previously listed as Drymotoxeres pucherani.

 

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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2023 Least Concern
2016 Near Threatened A2c+3c+4c
2012 Near Threatened A2c+3c+4c
2008 Near Threatened A2c; A3c; A4c
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Lower Risk/Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 1,540,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing poor suspected 2017-2030
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-19% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-19% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-19% - - -
Generation length 4.18 years - - -
Number of subpopulations 2-100 - - -
Percentage of mature individuals in largest subpopulation 1-89% - - -

Population justification: The global population size has not been quantified, but this species is described as rare; its distribution is patchy and localised (Stotz et al. 1996, Marantz et al. 2020, eBird 2022).
The population in Ecuador is suspected to number just above 10,000 mature individuals (per Freile et al. 2019).

Trend justification: A slow population decline is suspected to be occurring, owing to ongoing habitat loss and degradation throughout the range.
Tree cover within the range is lost at a rate of 2% over three generations (12.5 years; Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Despite occasionally being found outside of forests, the species is described as highly sensitive to disturbance and habitat degradation (Marantz et al. 2020) and consequently, population declines may exceed the rate of tree cover loss. Tentatively, they are here placed in the band 1-19% over three generations, but an accurate quantification of the trend is urgently required.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Colombia Eco-parque Los Besotes
Ecuador Cordillera de Huacamayos-San Isidro-Sierra Azul
Ecuador Mindo and western foothills of Volcan Pichincha
Ecuador Montañas de Zapote-Najda
Ecuador Reserva Ecológica Antisana (west) and adjacent areas
Ecuador Parque Nacional Cayambe-Coca
Peru Cordillera del Cóndor
Colombia Farallones de Cali Natural National Park
Colombia Reserva Natural Tambito
Ecuador Manteles - El Triunfo - Sucre
Peru Manu
Colombia Munchique Natural National Park and southern extension

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1000 - 3250 m Occasional altitudinal limits (min) 900 m

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 Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations - Small-holder plantations Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Drymotoxeres pucheranii. Downloaded from https://datazone.birdlife.org/species/factsheet/greater-scythebill-drymotoxeres-pucheranii on 19/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 19/03/2024.