Overview

Distribution

Range Description

This species has an extensive distribution in shrublands in Australia. The nominate subspecies underwent a massive decline in the early 20th century that left it restricted to the Shark Bay region, Western Australia. Subspecies myall is moderately common in suitable habitat throughout its historical range in the Gawler Range, South Australia. Subspecies modestus, sensu stricto (Black 2010), is now extinct from its range in the south Northern Territory. The subspecies macrourus and inexpectatus are also now extinct (Black 2011a, b) .
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Molecular Biology and Genetics

Molecular Biology

Barcode data: Amytornis textilis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There is 1 barcode sequence available from BOLD and GenBank.   Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.  See the BOLD taxonomy browser for more complete information about this specimen.  Other sequences that do not yet meet barcode criteria may also be available.

AACCGATGACTATTCTCAACCAACCACAAAGATATCGGAACCCTCTACCTCATCTTCGGTGCATGAGCCGGTATAGTCGGAACCGCCCTA---AGTCTCCTAATTCGAGCAGAATTAGGCCAGCCCGGCGCCCTTCTAGGAGAT---GATCAGATCTACAATGTGATCGTCACCGCCCATGCCTTCGTCATAATCTTCTTCATAGTCATACCAATTATAATCGGAGGATTTGGTAACTGACTAGTTCCCCTTATA---ATCGGAGCACCAGACATAGCATTCCCCCGAATAAACAACATAAGCTTCTGACTCCTTCCCCCCTCTTTCCTCCTACTTCTAGCCTCCTCAACTGTGGAGGCCGGGGCCGGAACTGGATGAACCGTCTACCCCCCACTAGCAGGTAACCTAGCACATGCCGGAGCCTCAGTAGACCTG---GCCATTTTCTCCCTCCACCTGGCAGGAATTTCCTCCATCTTAGGTGCAATCAACTTCATTACAACAGCAATCAACATAAAACCCCCTGCCCTATCACAATACCAAACACCTCTATTCGTATGATCCGTACTAATTACGGCCGTCCTTCTCCTCCTATCACTCCCAGTCCTCGCTGCC---GGTATTACCATGCTTCTCACAGACCGAAACCTAAATACCACTTTCTTTGACCCAGCAGGAGGAGGAGACCCAATCCTGTACCAACACTTATTCTGATTTTTCGGACACCCAGAAGTATACATCCTAATCCTCCCAGGCTTCGGAATTATTTCCCACGTAGTAACCTACTATGCAGGGAAAAAA---GAACCTTTCGGATACATAGGAATAGTATGAGCCATACTATCAATCGGATTCCTAGGATTTATTGTATGAGCTCACCACATGTTCACCGTAGGTATAGACGTAGACACNNGAGCATACTTCACATCAGCCACCATAATCATTGCTATCCCAACCGGTATTAAGGTATTCAGCTGACTA---GCAACACTACACGGAG
-- end --

Download FASTA File
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Statistics of barcoding coverage: Amytornis textilis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

Reviewer/s
Butchart, S. & Symes, A.

Contributor/s

Justification
This species has a very large range, and hence does not 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). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, 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.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Population

Population
The species has a large global population estimated to be 20,000-50,000 individuals (Flegg and Madge 1995, Higgins et al. 2001).The nominate subspecies has two remaining populations, numbering c.21,500 individuals; subspecies myall may number c.10,000; subspecies modestus could number c.20,000.

Population Trend
Decreasing
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Threats

Major Threats
The extirpation of modestus and textilis from parts of their range has been attributed to overgrazing by livestock, and while it is a potential threat to all three subspecies, appears to be having no significant effect at present. The reasons for the patchy distribution of modestus are not understood. Its range is almost all under pastoral management, and it is absent from apparently suitable habitat but can survive in sparsely-covered, degraded habitat (Garnett and Crowley 2000).
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Wikipedia

Western grasswren

The western grasswren (Amytornis textilis), also referred to as the thick-billed grasswren (western subspecies) and, formerly, as the textile wren, is a species of bird in the Maluridae family. It is endemic to Australia. It was formerly lumped as the nominate subspecies of the thick-billed grasswren.[3]

History[edit]

The species, indeed the genus, was first collected in 1818 on Shark Bay’s Peron Peninsula, in north-west Western Australia, by Jean René Constant Quoy and Joseph Paul Gaimard, naturalists with Louis de Freycinet's circumnavigational exploring expedition in the French corvette Uranie. Although the original specimen was apparently lost with the shipwreck of the Uranie in the Falkland Islands, it had been illustrated by expedition artist Jacques Arago and was described (as Malurus textilis) by Dumont in 1824.[2]

Description[edit]

The western grasswren is a small, shy, mainly terrestrial bird. It has brown plumage, finely streaked with black and white, and a long, slender tail. Males are slightly larger than females, with adult males weighing 22–27 g and females 20–25 g. Females develop distinctive chestnut patches on their flanks beneath their wings at 1–2 months old. They are usually found in groups of two or three.[4]

Subspecies[edit]

Recognised subspecies are:[2][3]

Other described subspecies of doubtful validity include:[2]

Distribution and habitat[edit]

The species once occurred through much of south-western Australia, with an outlying subspecies in the Gawler Ranges of South Australia. The range of the nominate subspecies, which used to inhabit inland locations, has contracted westwards to the Shark Bay region since 1910. The cause is probably the decline in habitat quality resulting from overgrazing, which has reduced the availability of cover and nesting sites. Its preferred habitat is low, often Acacia dominated, semiarid shrubland, no more than a metre in height, that forms densely foliaged clumps and thickets.[4]

The Southwest Australian subspecies (A. t. macrourus) is now extinct. Its preferred habitat was dense thickets within a variety of eucalypt communities.[2]

Status and conservation[edit]

The population size of the nominate subspecies (A. t. textilis) has been estimated at 21,500 individuals occurring over an area of 20,000 km2, with an area of occupancy of 1200 km2. The population comprises a large subpopulation within Francois Peron National Park and a second subpopulation consisting of several disjunct groups on nearby pastoral lands. The generation length has been estimated at four years. Although the subspecies has suffered a severe reduction in range and population decline in the past, the remaining population is healthy and stable, and is not considered eligible for listing under Australia’s Environment Protection and Biodiversity Conservation Act 1999 (EPBC).[4]

The Gawler Ranges subspecies (A. t. myall) has an estimated population of about 8400 mature individuals, with a range area of 12,000 km2 and an area of occupancy of 600 km2. Its generation length has been estimated at 9.7 years and the population trend is one of decrease.[5]

References[edit]

  1. ^ BirdLife International (2012). "Amytornis textilis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013. 
  2. ^ a b c d e Black, Andrew (2011). "Western Australia, home of the Grass-Wren (Amytornis textilis)". Amytornis – Western Australian Journal of Ornithology 3: 1–12. 
  3. ^ a b Black A.B., Joseph L., Pedler L.P. and Carpenter G.A. (2010). "A taxonomic framework for interpreting evolution within the Amytornis textilis–modestus complex of grasswrens". Emu 110: 358–363. doi:10.1071/mu10045. 
  4. ^ a b c "Advice to the Minister for the Environment and Heritage from the Threatened Species Scientific Committee (the Committee) on Amendments to the list of Threatened Species under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act)". Dept of Environment and Heritage, Australia. Retrieved 2013-12-02. 
  5. ^ Stephen Garnett, Judit Szabo & Guy Dutson (2011). "Western Grasswren (Gawler Ranges)". Action Plan for Australian Birds 2010. CSIRO. Retrieved 2013-12-02. 
Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!