Data Zone
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.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2018 | 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 | low |
| Land mass type | Average mass | 383 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 88,800,000 | |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | poor | estimated | 2009 | |
| Population trend | stable | 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 | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 6.6 | - | - | - |
Population justification: The global population is estimated to number 100,000-1,000,000 individuals (Delaney and Scott 2006), while national population estimates include: c.100-10,000 breeding pairs in Taiwan, c.100-10,000 breeding pairs and < c.1,000 wintering individuals in Korea and c.100-100,000 breeding pairs in Japan (Brazil 2009).
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Australia | extant | native | ||||
| Bangladesh | extant | native | ||||
| Brunei | extant | native | ||||
| Cambodia | extant | native | ||||
| China (mainland) | extant | native | ||||
| Christmas Island (to Australia) | extant | native | ||||
| Cocos (Keeling) Islands (to Australia) | extant | native | yes | |||
| Cook Islands | extant | native | yes | |||
| Fiji | extant | native | yes | |||
| French Polynesia | extant | native | ||||
| Guam (to USA) | extant | native | yes | |||
| India | extant | native | ||||
| Indonesia | extant | native | ||||
| Japan | extant | native | ||||
| Malaysia | extant | native | ||||
| Marshall Islands | extant | native | yes | |||
| Micronesia, Federated States of | extant | native | yes | |||
| Myanmar | extant | native | ||||
| Nauru | extant | vagrant | ||||
| New Caledonia (to France) | extant | native | ||||
| New Zealand | extant | native | yes | |||
| North Korea | extant | native | ||||
| Northern Mariana Islands (to USA) | extant | native | yes | |||
| Palau | extant | native | yes | |||
| Papua New Guinea | extant | native | ||||
| Philippines | extant | native | ||||
| Singapore | extant | native | ||||
| Solomon Islands | extant | native | yes | |||
| South Korea | extant | native | ||||
| Taiwan, China | extant | native | ||||
| Thailand | extant | native | ||||
| Timor-Leste | extant | native | yes | |||
| Tonga | extant | native | ||||
| Vietnam | extant | native |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | non-breeding |
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | breeding |
| Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | non-breeding |
| Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | breeding |
| Marine Intertidal | Mud Flats and Salt Flats | suitable | non-breeding |
| Marine Intertidal | Mud Flats and Salt Flats | suitable | breeding |
| Marine Intertidal | Rocky Shoreline | major | non-breeding |
| Marine Intertidal | Rocky Shoreline | major | breeding |
| Marine Intertidal | Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc | marginal | resident |
| Marine Intertidal | Shingle and/or Pebble Shoreline and/or Beaches | marginal | resident |
| Marine Intertidal | Tidepools | suitable | non-breeding |
| Marine Intertidal | Tidepools | suitable | breeding |
| Marine Neritic | Coral Reef - Back Slope | suitable | non-breeding |
| Marine Neritic | Coral Reef - Back Slope | suitable | breeding |
| Marine Neritic | Coral Reef - Foreslope (Outer Reef Slope) | suitable | non-breeding |
| Marine Neritic | Coral Reef - Foreslope (Outer Reef Slope) | suitable | breeding |
| Marine Neritic | Coral Reef - Inter-Reef Rubble Substrate | suitable | non-breeding |
| Marine Neritic | Coral Reef - Inter-Reef Rubble Substrate | suitable | breeding |
| Marine Neritic | Coral Reef - Inter-Reef Soft Substrate | suitable | non-breeding |
| Marine Neritic | Coral Reef - Inter-Reef Soft Substrate | suitable | breeding |
| Marine Neritic | Coral Reef - Lagoon | suitable | non-breeding |
| Marine Neritic | Coral Reef - Lagoon | suitable | breeding |
| Marine Neritic | Coral Reef - Outer Reef Channel | suitable | non-breeding |
| Marine Neritic | Coral Reef - Outer Reef Channel | suitable | breeding |
| Marine Neritic | Estuaries | suitable | non-breeding |
| Marine Neritic | Estuaries | suitable | breeding |
| Altitude | Occasional altitudinal limits |
| Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
|---|---|---|---|---|---|---|
| Pets/display animals, horticulture | - | - | international | non-trivial | recent |
Recommended citation
BirdLife International (2023) Species factsheet: Egretta sacra. Downloaded from
http://datazone.birdlife.org/species/factsheet/pacific-reef-egret-egretta-sacra on 06/06/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 06/06/2023.
