Current view: Data table and detailed info
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: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
IUCN Red List criteria met and history
Red List criteria met
Red List history
Migratory status |
not a migrant |
Forest dependency |
medium |
Land-mass type |
continent
|
Average mass |
- |
Population justification: The species’s population size has not previously been estimated and no survey data are available, but it has been described as ‘rare’. Based on the estimated area of forest with at least 30% canopy cover in the species’s mapped range in 2018 (14,000 km2), the recorded population densities of a closely-related species with a similar ecology (Dacnis cayana: 0.7 individuals/km2 in lowland rainforest in southern Guyana [Thiollay 1986], 12 individuals/km2 in rainforest in Peru [Munn 1995]), and assuming that 22-45% of suitable habitat is occupied, the species’s population size is suspected to fall within the range 4,412 – 75,636 individuals, roughly equivalent to 2,941-50,424 mature individuals. Whilst the species is described as rare, the species has been recorded over a wide area and it could be fairly cryptic and overlooked. Additionally, the lower bound of habitat occupancy (22% of forest within its range) could be unduly conservative, given that large parts of the species’s range contain reasonably intact forest. It is therefore considered unlikely that the true population size falls below or approaches the threshold of 10,000 mature individuals, so it is here placed in the band 10,000-19,999 mature individuals.
Trend justification: Data on trends are lacking, but slow to moderate declines are likely to be occurring, owing to habitat loss within parts of the range. An analysis of forest loss from 2000 to 2012 found that forest within the species’s range was lost at a rate equivalent to 2% over three generation lengths (Tracewski et al. 2016). Assuming the population has declined at the same rate as the forest cover, the species is suspected to have undergone a reduction of 2% over the past three generation lengths, and assuming that forest loss continues at a similar rate, the population may be assumed to continue to decline at this rate in future.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2024) Species factsheet: Viridian Dacnis Dacnis viguieri. Downloaded from
https://datazone.birdlife.org/species/factsheet/viridian-dacnis-dacnis-viguieri on 22/12/2024.
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 22/12/2024.