LC
Little Blue Heron Egretta caerulea



Taxonomy

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
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: #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 Low
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 33,400,000 medium
Extent of Occurrence non-breeding (km2) 30,500,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
Population trend Decreasing suspected -
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 - - -
Largest subpopulations - - -
Generation length (yrs) 6.6 - - -

Trend justification: The overall population trend is decreasing, although some populations have unknown trends (Wetlands International 2006). This species has undergone a small or statistically insignificant decrease over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007) Note, however, that these surveys cover less than 50% of the species's range in North America.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Anguilla (to UK) N Extant
Antigua and Barbuda N Extant
Argentina N Extant
Aruba (to Netherlands) N Extant
Bahamas N Extant
Barbados N Extant
Belize N Extant Yes
Bermuda (to UK) N Extant Yes
Bolivia N Extant
Bonaire, Sint Eustatius and Saba (to Netherlands) N Extant
Brazil N Extant
Canada N Extant
Cayman Islands (to UK) N Extant
Chile N Extant
Colombia N Extant
Costa Rica N Extant Yes
Cuba N Extant
Dominica N Extant
Dominican Republic N Extant
Ecuador N Extant
El Salvador N Extant
French Guiana N Extant
Greenland (to Denmark) V Extant
Grenada N Extant
Guadeloupe (to France) N Extant
Guatemala N Extant
Guyana N Extant
Haiti N Extant
Honduras N Extant
Jamaica N Extant Yes
Martinique (to France) N Extant
Mexico N Extant
Montserrat (to UK) N Extant
Nicaragua N Extant
Panama N Extant
Paraguay N Extant
Peru N Extant
Portugal V Extant
Puerto Rico (to USA) N Extant Yes
Sint Maarten (to Netherlands) N Extant
South Africa V Extant
St Barthelemy (to France) N Extant
St Kitts and Nevis N Extant
St Lucia N Extant
St Martin (to France) N Extant
St Pierre and Miquelon (to France) V Extant Yes
St Vincent and the Grenadines N Extant
Suriname N Extant
Trinidad and Tobago N Extant
Turks and Caicos Islands (to UK) N Extant
Uruguay V Extant
USA N Extant Yes
Venezuela N Extant
Virgin Islands (to UK) N Extant Yes
Virgin Islands (to USA) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Cuba Humedal Sur de Pinar del Río
Jamaica Yallahs
Puerto Rico (to USA) Vaqueria
Bahamas Great Inagua
Bahamas Harrold and Wilson Ponds National Park
Bahamas Long Island and Hog Cay
Bahamas Grog Pond
St Vincent and the Grenadines Ashton Wetland
St Vincent and the Grenadines Mustique Island
Bahamas Booby Rocks and Pirates Bay
Bahamas Southern Great Lake
Bahamas Low Cay, High Cay and Sandy Hook
Bahamas South Beach Tidal Flats
Bahamas Driggs Hill to Mars Bay
St Lucia Castries and Dennery Waterworks Reserve and Marquis
Nicaragua Juan Venado Island
Nicaragua Bluefields Bay and adjacent landscape
Nicaragua Bosawas
Antigua and Barbuda McKinnons Salt Pond
Antigua and Barbuda Valley Church Bay
Antigua and Barbuda Potworks Dam
Antigua and Barbuda Christian Valley
Antigua and Barbuda Bethesda Dam
Antigua and Barbuda Christian Cove
Antigua and Barbuda Hanson's Bay – Flashes
Costa Rica Nicoya Gulf mangroves and coastal areas
Bahamas Mangrove Cay
Cuba Las Picuas - Del Cristo Cay
Cuba Cienaga de Lanier y Sur de la Isla de la Juventud
Bahamas Cat Island Wetlands
St Lucia Pitons (Qualibou and Canaries)
St Lucia Point Sables
St Lucia Iyanola and Grande Anses, Esperance and Fond D'ors
St Lucia Mandelé Protected Landscape
Virgin Islands (to USA) Great Pond
Virgin Islands (to USA) Magens Bay
Virgin Islands (to USA) Southgate and Green Cay
Anguilla (to UK) Cove Pond
Virgin Islands (to USA) John Brewer's Bay
Bahamas Red Bays
Jamaica Black River Great Morass
Bahamas Conception Island National Park
Trinidad and Tobago Caroni Swamp
Mexico Humedales Costeros del Norte de la Península de Yucatán
Mexico Sur de Quintana Roo
Guyana Mapari - Kanuku Mountain
Guyana North Rupununi-Karanambu Ranch
Guyana Crane Pond- Rupununi River
Guyana Shell Beach
Jamaica Font Hill
USA Barataria Terrebonne
Mexico Cuenca baja del Río Papagayo
Mexico Presa de Valsequillo
Brazil Mangue Seco
Colombia El Encanto de Guanapalo

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable breeding
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable non-breeding
Marine Intertidal Salt Marshes (Emergent Grasses) suitable breeding
Marine Intertidal Salt Marshes (Emergent Grasses) suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major non-breeding
Altitude 0 - 3750 m Occasional altitudinal limits  

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2020) Species factsheet: Egretta caerulea. Downloaded from http://www.birdlife.org on 29/10/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/10/2020.