• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

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

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	11,800 km2	medium
Severely fragmented?	yes	-

	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	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brazil	extant	native	yes

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

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	160 - 980 m	Occasional altitudinal limits

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

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Recommended citation
BirdLife International (2024) Species factsheet: Alagoas Tyrannulet Phylloscartes ceciliae. Downloaded from https://datazone.birdlife.org/species/factsheet/alagoas-tyrannulet-phylloscartes-ceciliae on 22/11/2024.
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 22/11/2024.