Chapada Flycatcher Guyramemua affinis


Taxonomic note
Lopes et al. (2018) established a new genus for the species following confirmation that it is more closely related to Sublegatus than to Suiriri suiriri, and that there are significant and consistent differences from the three members of Sublegatus. Hence the proposed new genus Guyramemua Lopes et al. 2018 is accepted by the BirdLife Taxonomic Working Group, hence Suiriri affinis (del Hoyo and Collar 2016) becomes Guyramemua affinis (HBW and BirdLife International (2019).

Previously Suiriri affinis (del Hoyo and Collar 2016) was newly described as Suiriri islerorum by Zimmer et al. (2001). However, the type specimen of S. affinis previously believed to belong to S. suiriri was subsequently shown to relate to this species, and takes precedence (Kirwan et al. 2014).

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.
Handbook of the Birds of the World and BirdLife International. 2019. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 4. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v4_Dec19.zip.
Kirwan, G.M., F.D. Steinheimer, M.A. Raposo, and K.J. Zimmer. 2014. Nomenclatural corrections, neotype designation and new subspecies description in the genus Suiriri (Aves: Passeriformes: Tyrannidae). Zootaxa 3784: (224-240).
Lopes, L.E., Chaves, A.V., de Aquino, M.M., Silveira, L.F. and dos Santos, F.R. 2018. The striking polyphyly of Suiriri: Convergent evolution and social mimicry in two cryptic Neotropical birds. Journal of Zoological Systematics and Evolutionary Research 56(2): 270-279.
Zimmer, K. J.; Whittaker, A.; Oren, D. C. 2001. A cryptic new species of Flycatcher (Tirannidae: Suiriri) from the Cerrado region of Central South America. The Auk 118: 56-78.

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

Red List history
Year Category Criteria
2022 Near Threatened A2bc
2016 Near Threatened A2b+3b
2012 Near Threatened A2b+3b
2009 Near Threatened A2b; A3b
2008 Least Concern
2004 Least Concern
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency does not normally occur in forest
Land-mass type Average mass -

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,720,000 km2 medium
Severely fragmented? no -
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing medium suspected -
Rate of change over the past 10 years/3 generations (longer of the two periods) 24% - - -
Generation length 2.98 years - - -

Population justification: The global population size has not been quantified. The species is described as rare to locally fairly common. In shrubby areas with grass and scattered trees along the Agua Fria road near Chapada dos Guimar, for example, 1-2 pairs per km were recorded in limited roadside surveys (del Hoyo et al. 2004).

Trend justification: The species is feared to decline in line with the loss and conversion of its cerrado habitat.
An estimated decline of 13% occurred in the adult population at Estação Ecológica de Águas Emendadas, Brazil, between 2003 and 2007 (L. F. França and M. A. Marini in litt. 2008, França and Marini 2010). The drivers of declines are not well understood: this site is apparently well protected and has apparently suffered little anthropogenic alteration since its formal protection. However, on the basis of apparent rarity in other large protected areas of cerrado, it is precautionarily suspected that these declines are representative for the entire range and that they are continuing at this rate to the present day. Consequently, the total population is suspected to have declined by 24% over the past ten years.

Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Bolivia extant native yes
Brazil extant native yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Savanna Dry major resident
Altitude 250 - 1200 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
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
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations - Agro-industry plantations Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Ecosystem degradation, Ecosystem conversion
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Majority (50-90%) Causing/Could cause fluctuations Medium Impact: 6
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Guyramemua affinis. Downloaded from https://datazone.birdlife.org/species/factsheet/chapada-flycatcher-guyramemua-affinis on 03/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 03/03/2024.