IUCN Red List Criteria
| Critically Endangered |
|
| Endangered |
D |
| Vulnerable |
D1+2 |
IUCN Red List history
| Year |
Category |
| 2012 |
Endangered |
| 2008 |
Endangered |
| 2006 |
Endangered |
| 2004 |
Endangered |
| 2000 |
Endangered |
| 1996 |
Critically Endangered |
| 1994 |
Critically Endangered |
| 1988 |
Threatened |
Species attributes
| Migratory status |
not a migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
21 |
medium |
| Number of locations |
6-10 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
100 |
medium |
Estimated |
2004 |
| Population trend |
Stable |
good |
|
- |
| Number of subpopulations |
2-100 |
- |
- |
- |
| Largest subpopulation |
51-250 |
- |
- |
- |
| Generation length (yrs) |
4.4 |
- |
- |
- |
|
Population justification: In 1999, the population was estimated to be no less than 150 individuals, and it remained at this level until 2004 at least (A. Cristinacce and C. Jones in litt. 2005). The population has since been reported to have risen rapidly to number over 3,000 individuals by 2010 (C. Jones in litt. 2010, V. Tatayah in litt. 2011) and close to 4,000 by 2012 (V. Tatayah in litt. 2012). Confirmation of this would result in a revised population estimate, but this is currently precautionarily retained as 150 individuals, equating to a minimum of 100 mature individuals. |
|
Trend justification: Surveys suggest that the population size was stable between 1999 and 2004 (A. Cristinacce and C. Jones in litt. 2005). The population has since been reported to have risen rapidly to number over 3,000 individuals by 2010 (C. Jones in litt. 2010, V. Tatayah in litt. 2011) - confirmation of this would result in a revised trend estimate, but the trend is currently precautionarily assumed to have remained stable. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Mauritius |
Native |
No |
|
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Mauritius |
Rodrigues mainland |
 |
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Introduced vegetation |
|
suitable |
resident |
| Shrubland |
Subtropical/Tropical Dry |
suitable |
resident |
| Shrubland |
Subtropical/Tropical Moist |
major |
resident |
|
Altitude
|
200 - 390 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Agriculture & Aquaculture |
Annual & perennial non-timber crops / Small-holder farming |
Timing |
Scope |
Severity |
Impact |
| Past, Likely to Return |
Minority (<50%) |
No decline |
Past Impact |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Agriculture & Aquaculture |
Livestock farming & ranching / Small-holder grazing, ranching or farming |
Timing |
Scope |
Severity |
Impact |
| Past, Likely to Return |
Minority (<50%) |
No decline |
Past Impact |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Biological resource use |
Fishing & harvesting aquatic resources / Unintentional effects: (large scale) |
Timing |
Scope |
Severity |
Impact |
| Past, Likely to Return |
Minority (<50%) |
Slow, Significant Decline |
Past Impact |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Human intrusions & disturbance |
Work & other activities |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Unknown |
Unknown |
| Stresses |
|---|
| Species disturbance |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Black Rat (Rattus rattus) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
No decline |
Low Impact: 5 |
| Stresses |
|---|
| Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Brown Rat (Rattus norvegicus) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
No decline |
Low Impact: 5 |
| Stresses |
|---|
| Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
No decline |
Low Impact: 5 |
| Stresses |
|---|
| Reduced reproductive success, Species mortality |
|
| Climate change & severe weather |
Droughts |
Timing |
Scope |
Severity |
Impact |
| Past, Likely to Return |
Majority (50-90%) |
Unknown |
Past Impact |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion, Reduced reproductive success, Species mortality |
|
| Climate change & severe weather |
Habitat shifting & alteration |
Timing |
Scope |
Severity |
Impact |
| Future |
Whole (>90%) |
Unknown |
Unknown |
| Stresses |
|---|
| Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion |
|
| Climate change & severe weather |
Storms & flooding |
Timing |
Scope |
Severity |
Impact |
| Past, Likely to Return |
Majority (50-90%) |
Unknown |
Past Impact |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion, Reduced reproductive success, Species mortality |
|
Utilisation
| Purpose |
Primary form used |
Life stage used |
Source |
Scale |
Level |
Timing |
| Pets |
Whole |
Adults and juveniles |
Wild |
International |
Non-trivial |
Recent |
Recommended citation
BirdLife International (2013) Species factsheet: Acrocephalus rodericanus. Downloaded from
http://www.birdlife.org on 19/06/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 19/06/2013.
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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