IUCN Red List Criteria
| Critically Endangered |
|
| Endangered |
C1 |
| Vulnerable |
A2bc+3bc+4bc;C1 |
IUCN Red List history
| Year |
Category |
| 2012 |
Endangered |
| 2009 |
Endangered |
| 2008 |
Endangered |
| 2006 |
Endangered |
| 2004 |
Endangered |
| 2000 |
Vulnerable |
| 1996 |
Endangered |
| 1994 |
Endangered |
| 1988 |
Lower Risk/Least Concern |
Species attributes
| Migratory status |
not a migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
Australia
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
323,000 |
medium |
| Number of locations |
11-100 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
1000-2499 |
poor |
Estimated |
2009 |
| Population trend |
Decreasing |
poor |
|
- |
| Number of subpopulations |
2-100 |
- |
- |
- |
| Largest subpopulation |
|
- |
- |
- |
| Generation length (yrs) |
5.5 |
- |
- |
- |
|
Population justification: In New Zealand, the estimated population was between 580-725 individuals in 1980. The population on New Caledonia is not thought to exceed 50 individuals. Following apparently rapid declines, the Australian population is now thought to number fewer than 1,000 mature individuals (R. Loyn in litt. 2008). The total population is best placed in the band 1,000-2,499 mature individuals, equating to 1,500-3,749 individuals in total, rounded here to 1,500-4,000 individuals. |
|
Trend justification: Population trends are unknown for the small New Caledonian population, whilst in New Zealand (c.40% of the global population) the species is suspected to be stable. In Australia, however, reporting rates in atlas surveys have declined by 77% since the first atlas in 1977-1981 and 58% since the second atlas in 1998-2003. This equates to an overall population decline of c.38% over the past three generations, or 26% over the past two generations. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Australia |
Native |
No |
|
|
|
| New Caledonia (to France) |
Unknown |
No |
Yes |
|
|
| New Zealand |
Native |
No |
|
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Australia |
Barmah-Millewa |
 |
| Australia |
Bellarine Wetlands |
|
| Australia |
Benger Swamp |
|
| Australia |
Carrum Wetlands |
|
| Australia |
Coorong |
|
| Australia |
Discovery Bay to Piccaninnie Ponds |
|
| Australia |
Egg Islands (Huon Estuary) |
|
| Australia |
Fivebough and Tuckerbil Swamps |
|
| Australia |
Griffith Wetlands |
|
| Australia |
Gulf St Vincent |
|
| Australia |
Gwydir Wetlands |
|
| Australia |
Hastings-Macleay |
|
| Australia |
Hunter Estuary |
|
| Australia |
Lake Hawdon System |
|
| Australia |
Lake Pleasant View System |
|
| Australia |
Lakes Alexandrina and Albert |
|
| Australia |
Lower Brodribb River |
|
| Australia |
Macquarie Marshes |
|
| Australia |
Muir-Unicup Wetlands |
|
| Australia |
Narran Wetlands |
|
| Australia |
North Victorian Wetlands |
|
| Australia |
Owingup Swamp and Boat Harbour Wetlands |
|
| Australia |
Two Peoples Bay and Mount Manypeaks |
|
| Australia |
Yambuk |
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Marine Intertidal |
Salt Marshes (Emergent Grasses) |
major |
resident |
| Wetlands (inland) |
Bogs, Marshes, Swamps, Fens, Peatlands |
major |
resident |
|
Altitude
|
0 - 800 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Agriculture & Aquaculture |
Annual & perennial non-timber crops / Agro-industry farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Transportation & service corridors |
Utility & service lines |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
|---|
| Species mortality |
|
| Biological resource use |
Hunting & trapping terrestrial animals / Intentional use (species is the target) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
|---|
| Species disturbance, Species mortality |
|
| Natural system modifications |
Dams & water management/use / Abstraction of ground water (agricultural use) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Natural system modifications |
Other ecosystem modifications |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Climate change & severe weather |
Droughts |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
Utilisation
| Purpose |
Primary form used |
Life stage used |
Source |
Scale |
Level |
Timing |
| Other |
Whole |
Adults and juveniles |
Wild |
Subsistence, National |
Non-trivial |
Historical |
| Sport |
Whole |
Adults and juveniles |
Wild |
Subsistence, National |
Non-trivial |
Recent |
Recommended citation
BirdLife International (2013) Species factsheet: Botaurus poiciloptilus. Downloaded from
http://www.birdlife.org on 25/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 25/05/2013.
This information is based upon, and updates, the information published in BirdLife International (2000)
Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004)
Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
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