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

Taxonomic note
Tringa incana (del Hoyo and Collar 2014) was previously placed in the genus Heteroscelus as H. incanus.

Taxonomic source(s)
Christidis, L. and Boles, W.E. 2008. Systematics and Taxonomy of Australian Birds. CSIRO Publishing, Collingwood, Australia.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions 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.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2024	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,450,000 km2	medium
Extent of Occurrence (non-breeding)	103,000,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	18000 mature individuals	good	estimated	2023
Population trend	unknown	-	-	-
Generation length	5.71 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The species has a relatively small estimated population size at 18,000 mature individuals (Partners in Flight 2023).

Trend justification: Over the past three generations (c. 17 years), data from the Christmas Bird Count (Meehan et al. 2022) indicate a decline of c. 45%, but this survey covers only a very small proportion of the species' wintering range and it is therefore not considered representative (B. Andres in litt. to Partners in Flight 2020). Similarly, while the Breeding Bird Survey (Ziolkowski Jr et al. 2022) suggests that the population remained broadly stable overall, only some parts of the species' range are well covered by the BBS (A. Shaw in litt. to Partners in Flight 2023). Consequently, the species' trend is currently best described as unknown (Partners in Flight 2023).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
American Samoa	extant	native			yes
Australia	extant	native			yes
Canada	extant	native		yes
Chile	extant	native			yes
Colombia	extant	native			yes
Cook Islands	extant	native			yes
Costa Rica	extant	native			yes
Ecuador	extant	native			yes
El Salvador	extant	native			yes
Fiji	extant	native			yes
French Polynesia	extant	native			yes
Guam (to USA)	extant	native			yes
Guatemala	extant	native			yes
Honduras	extant	native			yes
Indonesia	extant	vagrant			yes
Japan	extant	vagrant			yes
Kiribati	extant	native			yes
Marshall Islands	extant	native			yes
Mexico	extant	native			yes
Micronesia, Federated States of	extant	native			yes
Nauru	extant	native			yes
New Caledonia (to France)	extant	native			yes
New Zealand	extant	native			yes
Nicaragua	extant	native			yes
Niue (to New Zealand)	extant	native			yes
Northern Mariana Islands (to USA)	extant	native			yes
Palau	extant	native			yes
Panama	extant	native			yes
Papua New Guinea	extant	native			yes
Peru	extant	native			yes
Pitcairn Islands (to UK)	extant	native			yes
Russia	extant	native		yes
Russia (Asian)	extant	native		yes
Samoa	extant	native			yes
Solomon Islands	extant	native			yes
Taiwan, China	extant	vagrant			yes
Tokelau (to New Zealand)	extant	native			yes
Tonga	extant	native			yes
Tuvalu	extant	native			yes
United States Minor Outlying Islands (to USA)	extant	native			yes
USA	extant	native		yes
Vanuatu	extant	native			yes
Wallis and Futuna Islands (to France)	extant	native			yes

Country/Territory	IBA Name
Costa Rica	Nicoya Gulf mangroves and coastal areas
Ecuador	Áreas costeras de Fernandina y del occidente de Isabela
Ecuador	Isla de la Plata
Ecuador	Isla Española
Ecuador	Isla Floreana
Ecuador	Isla San Cristóbal

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Marine Intertidal	Rocky Shoreline	major	non-breeding
Marine Intertidal	Tidepools	major	non-breeding
Marine Neritic	Coral Reef - Back Slope	major	non-breeding
Marine Neritic	Coral Reef - Foreslope (Outer Reef Slope)	major	non-breeding
Marine Neritic	Coral Reef - Inter-Reef Rubble Substrate	major	non-breeding
Marine Neritic	Coral Reef - Inter-Reef Soft Substrate	major	non-breeding
Marine Neritic	Coral Reef - Lagoon	major	non-breeding
Marine Neritic	Coral Reef - Outer Reef Channel	major	non-breeding
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	major	breeding
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Slow, Significant Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Unknown		Unknown
		Stresses Ecosystem degradation, Ecosystem conversion
Pollution	Industrial & military effluents - Oil spills	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species disturbance, Reduced reproductive success
Residential & commercial development	Commercial & industrial areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Wandering Tattler Tringa incana. Downloaded from https://datazone.birdlife.org/species/factsheet/wandering-tattler-tringa-incana on 04/12/2024.
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 04/12/2024.