CR
Alagoas Tyrannulet Phylloscartes ceciliae



Taxonomy

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
Critically Endangered Endangered Vulnerable
C2a(i) C2a(i); D B1ab(ii,iii,iv,v); C2a(i); D1

Red List history
Year Category Criteria
2021 Critically Endangered C2a(i)
2017 Critically Endangered C2a(i)
2016 Endangered B1ab(i,ii,iii,v);C2a(ii)
2012 Endangered B1ab(i,ii,iii,v);C2a(ii)
2008 Endangered B1a+b(i,ii,iii,v)
2004 Endangered
2000 Critically Endangered
1996 Endangered
1994 Endangered
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type continent
Average mass 8 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 11,800 km2 medium
Severely fragmented? yes -
Population
Estimate Data quality Derivation Year of estimate
Population size 50-249 mature individuals poor estimated 2014
Population trend decreasing poor inferred 2012-2022
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-5% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-5% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-5% - - -
Generation length 2.35 years - - -
Percentage of mature individuals in largest subpopulation 1-89% - - -

Population justification: There is little population data available, but it has been described as locally quite common (Roda et al. 2011). At Pedra Branca, it was considered rather common, but 15 days of observations between 1996-1999 found the species on only three occasions (A. Whittaker in litt. 1999). Numerous surveys by ornithologists within the species's range have encountered few individuals, leading to the conclusion in the Brazilian Red List that the population size is less than 250 mature individuals, with no more than 50 mature individuals in any subpopulation (MMA 2014, Melo Dantas and Lees 2018). The population size is therefore placed in the band 50-249 mature individuals.

Trend justification: Remote-sensed data indicates that approximately 5% of tree cover with at least 50% canopy cover was lost within the species's mapped range over ten years from 2009 to 2019 (Global Forest Watch 2020). From this information, the species's population size is inferred to be declining, at a rate suspected to be within the range 1-5% over ten years. Assuming forest loss continues at a similar rate, the species is suspected to also undergo a population size reduction of 1-5% over the next decade.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Brazil Engenho Coimbra (Usina Serra Grande)
Brazil Mata do Estado (Mata do Sirigi)
Brazil Murici
Brazil Reserva Biológica de Pedra Talhada
Brazil São José da Laje / Canhotinho
Brazil Serra do Urubu

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 160 - 980 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
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
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 Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species disturbance, Ecosystem degradation

Recommended citation
BirdLife International (2024) Species factsheet: Alagoas Tyrannulet Phylloscartes ceciliae. Downloaded from https://datazone.birdlife.org/species/factsheet/alagoas-tyrannulet-phylloscartes-ceciliae 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.