LC
Whistling Heron Syrigma sibilatrix



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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://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
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 -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 8,950,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Unknown not applicable -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 6.7 - - -

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Argentina N Extant
Bolivia N Extant
Brazil N Extant
Colombia N Extant
Paraguay N Extant
Uruguay N Extant Yes
Venezuela N Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Argentina Pastizales de La Travesía y Buena Esperanza
Argentina Parque Nacional Chaco
Argentina Parque Provincial Pampa del Indio
Argentina Reserva El Bagual
Argentina Estancia Puerto Valle
Argentina Estancia San Juan Poriahú
Argentina Reserva Natural Rincón de Santa María
Argentina Estero Valenzuela
Argentina Cuenca del río Aguapey
Argentina Loma Alta
Argentina Parque Nacional Mburucuyá
Argentina Estancia Mora Cué y alrededores
Argentina Rincón del Socorro-Iberá
Argentina Lomada de San Alonso
Argentina Parque Nacional El Palmar
Argentina Perdices
Argentina Nandubaysal-El Potrero
Argentina Pastizales de Ibicuy
Argentina Islas de Victoria
Argentina Parque Nacional Pre-Delta
Argentina Ceibas
Argentina Selva de Montiel
Argentina Cuña boscosa de Santa Fe
Argentina Jaaukanigás
Argentina Bajos Submeridionales
Argentina Reserva Provincial de Usos Múltiples Federico Wildermuth
Argentina San Javier
Argentina Sur de Ramallo
Argentina Villa Iris, Chasicó, Napostá
Argentina Vuelta de Obligado
Argentina Barrancas de Baradero
Argentina Reserva Natural Otamendi, Reserva Provincial Río Lujan y alrededores
Argentina El Talar de Belén
Argentina Parque Costero del Sur
Argentina Bahía Samborombón
Argentina Laguna de Pradere
Argentina Albufera de Mar Chiquita
Argentina Reserva Provincial Laguna Salada Grande
Argentina Reserva Campos del Tuyú, Estancia El Palenque y Los Ingleses
Argentina Cuenca del Río Salado
Argentina Reserva Ecológica Costanera Sur
Paraguay Parque Nacional Tinfunqué - Estero Patiño
Argentina Lagunas Encadenadas del Oeste de la Provincia de Buenos Aires
Colombia El Encanto de Guanapalo
Colombia Parque Nacional Natural Chiribiquete
Colombia Sumapaz Natural National Park
Colombia Bojonawi

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 breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded major non-breeding
Grassland Temperate suitable breeding
Grassland Temperate suitable non-breeding
Savanna Dry suitable breeding
Savanna Dry suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Altitude 0 - 1200 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Syrigma sibilatrix. Downloaded from http://www.birdlife.org on 08/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 08/08/2022.