• 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); D1

Red List history

Year	Category	Criteria
2020	Endangered	C2a(i)
2016	Endangered	C2a(i)
2012	Endangered	C2a(i)
2008	Vulnerable	D1
2005	Vulnerable
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	medium
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	28,700 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	250-999 mature individuals	poor	estimated	2020
Population trend	decreasing	poor	inferred	1998-2008
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	3.21 years	-	-	-
Number of subpopulations	2-100	-	-	-

Population justification: D. Wiedenfield (in litt. 2004) considers the population likely to number fewer than 1,000 individuals, and possibly even fewer than 200. A. Tye (in litt. 2005) estimates the population to number c.600 individuals. Wiedenfield and Jiménez-Uzcátegui (2008) consider it likely to number much fewer than 500 individuals, an estimate further backed up by the surveys of Anchundia and Fessl (2020) although a more accurate estimate could not be determined. It is placed in the band 250-999 mature individuals here, equating to 375-1,499 individuals in total, rounded here to 350-1,500 individuals.

Trend justification: Current population trends are unclear, but historical declines are probably continuing (A. Tye in litt. 2005, D. Wiedenfeld in litt. 2005, 2007, 2011, 2012, Wiedenfeld and Jiménez-Uzcátegui 2008, T. de Vries in litt. 2012, P. Grant in litt. 2012), a conclusion further supported by Anchundia and Fessl (2020). Minimum counts of birds observed at Daphne Major Island since the 1970s indicate a decline here (P. Grant in litt. 2012).

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Urban Areas	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Marine Coastal/Supratidal	Coastal Freshwater Lakes	major	resident
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	suitable	resident
Marine Intertidal	Rocky Shoreline	suitable	resident
Marine Intertidal	Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc	suitable	resident
Marine Intertidal	Shingle and/or Pebble Shoreline and/or Beaches	suitable	resident
Marine Intertidal	Tidepools	suitable	resident
Rocky areas (eg. inland cliffs, mountain peaks)		major	resident
Altitude	0 - 970 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Climate change & severe weather	Droughts	Timing		Scope		Severity		Impact
		Unknown		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Philornis downsi	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Plasmodium relictum	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Rattus rattus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Reduced reproductive success
Invasive and other problematic species, genes & diseases	Viral/prion-induced diseases - Avian Influenza Virus (H5N1 subtype)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Viral/prion-induced diseases - Avipoxvirus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Viral/prion-induced diseases - West Nile Virus (WNV)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Galapagos Martin Progne modesta. Downloaded from https://datazone.birdlife.org/species/factsheet/galapagos-martin-progne-modesta on 18/12/2024.
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 18/12/2024.