Whistling Heron (Syrigma sibilatrix) | Details

Whistling Heron Syrigma sibilatrix

Current view: Data table and detailed info

Taxonomy

Taxonomic source(s)
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.

IUCN Red List criteria met and history

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

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	8,950,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	23300-73300 mature individuals	-	-	2023
Population trend	stable	-	-	-
Generation length	5.01 years	-	-	-

Population justification: The global population size is estimated at 35,000-110,000 individuals (Wetlands International 2023), which equates to 23,300-73,300 mature individuals. The overall population trend is considered to be stable over three generations (15.03 years) (Wetlands International 2023).

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor
Argentina	extant	native
Bolivia	extant	native
Brazil	extant	native
Colombia	extant	native
Paraguay	extant	native
Uruguay	extant	native	yes
Venezuela	extant	native

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Pastureland	suitable	non-breeding
Artificial/Terrestrial	Pastureland	suitable	breeding
Grassland	Subtropical/Tropical Seasonally Wet/Flooded	major	non-breeding
Grassland	Subtropical/Tropical Seasonally Wet/Flooded	major	breeding
Grassland	Temperate	suitable	non-breeding
Grassland	Temperate	suitable	breeding
Savanna	Dry	suitable	non-breeding
Savanna	Dry	suitable	breeding
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	suitable	non-breeding
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	suitable	breeding
Altitude	0 - 2500 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Whistling Heron Syrigma sibilatrix. Downloaded from https://datazone.birdlife.org/species/factsheet/whistling-heron-syrigma-sibilatrix 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.