Kingdom | Phylum | Class | Order | Family |
---|---|---|---|---|
Animalia | Chordata | Aves | Gruiformes | Rallidae |
Scientific Name: | Tribonyx mortierii Du Bus, 1840 | |||
Common Name(s):
|
||||
Synonym(s): |
Gallinula mortierii (Du Bus, 1840)
Tribonyx mortierii Christidis and Boles (2008)
|
|||
Taxonomic Source(s): | Christidis, L. and Boles, W.E. 2008. Systematics and Taxonomy of Australian Birds. CSIRO Publishing, Collingwood, Australia. | |||
Taxonomic Notes: | Tribonyx mortierii (del Hoyo and Collar 2014) was previously placed in the genus Gallinula. |
Red List Category & Criteria: | Least Concern ver 3.1 |
Year Published: | 2016 |
Date Assessed: | 2016-10-01 |
Assessor(s): | BirdLife International |
Reviewer(s): | Butchart, S. & Symes, A. |
Facilitator/Compiler(s): | Butchart, S., Ekstrom, J., Fisher, S. & Harding, M. |
Justification: Although this species may have a restricted range, it is not believed to approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern. |
|
Previously published Red List assessments: |
|
Range Description: | This species formerly occurred on mainland Australia but disappeared around 4,700 years ago, roughly coinciding with the arrival of the dingo Canis familiaris. It is now restricted to Tasmania, Australia, although the species was introduced to Maria Island, off east Tasmania, in 1969. | ||||||||||||||
Countries occurrence: | Native: Australia | ||||||||||||||
Additional data: |
| ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Range Map: | Click here to open the map viewer and explore range. |
Population: | The global population size has not been quantified, but is very numerous within its range and is regarded as an agricultural pest. Trend Justification: The population trend is difficult to determine because of uncertainty over the impacts of habitat modification on population sizes. | ||||||||||||||
Current Population Trend: | ![]() | ||||||||||||||
Additional data: |
|
---|
Habitat and Ecology: | The species is found in a variety of habitats from open pasture and crops to permanent and seasonal freshwater wetlands. It requires short-grazed pasture for foraging and is currently dependent on swards maintained by introduced species (sheep, cattle and rabbits); swards were formerly maintained by grazing marsupials and by fire. It always breeds near water, usually from August-November, and mostly feeds on seeds and leaves, varying with the availability of plant species. It is flightless, making it very vulnerable to introduced predators. |
Systems: | Terrestrial; Freshwater |
Continuing decline in area, extent and/or quality of habitat: | Unknown |
---|---|
Generation Length (years): | 5.9 |
Movement patterns: | Not a Migrant |
Major Threat(s): | The recent spread of foxes (Vulpes) to Tasmania is of concern, and although they are still scarce it is likely that they will impact upon T. mortierii in the long term. |
Citation: | BirdLife International. 2016. Tribonyx mortierii. The IUCN Red List of Threatened Species 2016: e.T22692900A93373971. . Downloaded on 19 April 2018. |
Disclaimer: | To make use of this information, please check the <Terms of Use>. |
Feedback: | If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided |