LC
Mayan Antthrush Formicarius moniliger



Taxonomy

Taxonomic note

Formicarius analis and F. moniliger (del Hoyo and Collar 2016) were previously lumped as F. analis following AOU (1998 and supplements), SACC (2006 and updates), Sibley and Monroe (1990, 1993) and Stotz et al. (1996).

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.

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

Red List history
Year Category Criteria
2022 Least Concern
2016 Least Concern
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type Average mass 62 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 546,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - inferred 2016-2026
Rate of change over the past 10 years/3 generations (longer of the two periods) 10-19% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 10-19% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 10-19% - - -
Generation length 3.41 years - - -

Population justification: The global population size is unknown given recent taxonomic splits.

Trend justification: The species has undergone local declines and extinctions as a consequence of the loss and fragmentation of its habitat (Patten et al. 2021). Across the range, tree cover is lost at a rate of 12% over three generations (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). The species is sensitive to logging, disturbance and fragmentation and cannot persist in small, isolated forest patches (Patten et al. 2021); therefore, population declines may exceed the rate of tree cover loss. Tentatively, declines are here placed in the band 10-19% over three generations.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Belize extant native yes
Guatemala extant native yes
Honduras extant native yes
Mexico extant native yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane suitable resident
Forest Subtropical/Tropical Swamp major resident
Altitude 0 - 1800 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Formicarius moniliger. Downloaded from https://datazone.birdlife.org/species/factsheet/mayan-antthrush-formicarius-moniliger on 26/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 26/02/2024.