Grey Teal Anas Gracilis Species No.: 211 Band Size: 09 SS AM

Total Page:16

File Type:pdf, Size:1020Kb

Grey Teal Anas Gracilis Species No.: 211 Band Size: 09 SS AM Australian Bird Study Association Inc. – Bird in the Hand (Second Edition), published on www.absa.asn.au - July 2019 Grey Teal Anas gracilis Species No.: 211 Band size: 09 SS AM Morphometrics: Adult Male Adult Female Wing: 200 – 215 mm 193 – 202 mm Tail: 81 – 97 mm 77 – 89 mm Bill: 36.3 – 40.1 mm 33.7 – 37.7 mm Tarsus: 33 – 38 mm 31 – 36.4 mm Weight: 395 – 670 g 350 – 602 g Ageing: Post-juvenile moult commences at about seven weeks and lasts for about two months, in this moult most body feathers and tail feathers are replaced, and then plumage may be slightly duller, but is otherwise inseparable from adults; Although moult can be detected in most tracts throughout the year, the most active moult, including wings, occurs between December and March; Birds can breed in their first year, so all birds, except juveniles and known age recoveries, should be aged (1+). Sexing: No sexual dimorphism in plumage, but males may be marginally larger than females (see morphometrics above; The iris of adult males is vivid red, females are similar but a shade lighter and juveniles are hazel; Sex can be determined by: • cloacal manipulation (see Kingsford R.T. (1988). Methods and Problems of Sexing and Ageing Australian Waterfowl. Corella 12 (4) 120 – 121); and • call – adult males (peeps and whistles) have distinctively different calls to adult females (loud multisyllabic quacks) but they are extensive and varied and are unlikely to be useful for sexing birds in the hand; Incubation by female alone. Similar species: Female Grey Teal have a white throat, whereas the similar female Chestnut Teal is somewhat darker in overall appearance and lacks the white throat. References: HANZAB 1; Drawings: J.N. Davies in HANZAB 1 - © BirdLife Australia Compiled by J.W. Hardy for the Australian Bird Study Association Inc. and reproduced with permission of BirdLife Australia .
Recommended publications
  • Introduction
    Threatened Birds of Asia: The BirdLife International Red Data Book Editors N. J. COLLAR (Editor-in-chief), A. V. ANDREEV, S. CHAN, M. J. CROSBY, S. SUBRAMANYA and J. A. TOBIAS Maps by RUDYANTO and M. J. CROSBY Principal compilers and data contributors ■ BANGLADESH P. Thompson ■ BHUTAN R. Pradhan; C. Inskipp, T. Inskipp ■ CAMBODIA Sun Hean; C. M. Poole ■ CHINA ■ MAINLAND CHINA Zheng Guangmei; Ding Changqing, Gao Wei, Gao Yuren, Li Fulai, Liu Naifa, Ma Zhijun, the late Tan Yaokuang, Wang Qishan, Xu Weishu, Yang Lan, Yu Zhiwei, Zhang Zhengwang. ■ HONG KONG Hong Kong Bird Watching Society (BirdLife Affiliate); H. F. Cheung; F. N. Y. Lock, C. K. W. Ma, Y. T. Yu. ■ TAIWAN Wild Bird Federation of Taiwan (BirdLife Partner); L. Liu Severinghaus; Chang Chin-lung, Chiang Ming-liang, Fang Woei-horng, Ho Yi-hsian, Hwang Kwang-yin, Lin Wei-yuan, Lin Wen-horn, Lo Hung-ren, Sha Chian-chung, Yau Cheng-teh. ■ INDIA Bombay Natural History Society (BirdLife Partner Designate) and Sálim Ali Centre for Ornithology and Natural History; L. Vijayan and V. S. Vijayan; S. Balachandran, R. Bhargava, P. C. Bhattacharjee, S. Bhupathy, A. Chaudhury, P. Gole, S. A. Hussain, R. Kaul, U. Lachungpa, R. Naroji, S. Pandey, A. Pittie, V. Prakash, A. Rahmani, P. Saikia, R. Sankaran, P. Singh, R. Sugathan, Zafar-ul Islam ■ INDONESIA BirdLife International Indonesia Country Programme; Ria Saryanthi; D. Agista, S. van Balen, Y. Cahyadin, R. F. A. Grimmett, F. R. Lambert, M. Poulsen, Rudyanto, I. Setiawan, C. Trainor ■ JAPAN Wild Bird Society of Japan (BirdLife Partner); Y. Fujimaki; Y. Kanai, H.
    [Show full text]
  • Breeding Seabirds at Dassen Island, South Africa: Chances of Surviving Great White Pelican Predation
    Vol. 9: 125–131, 2010 ENDANGERED SPECIES RESEARCH Published online January 11 doi: 10.3354/esr00243 Endang Species Res OPENPEN ACCESSCCESS Breeding seabirds at Dassen Island, South Africa: chances of surviving great white pelican predation Martin M. Mwema1, 2,*, Marta de Ponte Machado1, 2, Peter G. Ryan1 1Percy Fitzpatrick Institute, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa 2Animal Demography Unit, Department of Zoology, University of Cape Town, Rondebosch 7701, South Africa Present address: Box 1019, 00100, GPO, Nairobi, Kenya ABSTRACT: Seabird predation by great white pelicans Pelecanus onocrotalus is an unusual phenom- enon that has become increasingly frequent in the Western Cape, South Africa. We report the scale of pelican predation and its impact on the breeding success of 5 seabird species monitored at Dassen Island in 2006. Pelican predation was observed on chicks of kelp gulls Larus dominicanus, crowned cormorants Phalacrocorax coronatus and Cape cormorants Phalacrocorax capensis. No predation on eggs was seen. Breeding success for 4 of the 5 species studied was low, with the white-breasted cor- morants Phalacrocorax lucidus having the highest breeding success (0.56 fledglings per nest). Cape and bank cormorants Phalacrocorax neglectus did not fledge any chicks, while crowned cormorants had a breeding success of 0.08 fledglings per nest. Kelp gulls had a hatching success of 46%, but only a few chicks fledged, giving a breeding success of 0.06 fledglings per nest. Pelican predation poses a threat to at least 3 of the 5 seabirds studied, all of which are endemic to southern Africa. Three spe- cies are globally Endangered or Near Threatened, and pelican predation places additional pressure on these species.
    [Show full text]
  • Movements of a Nomadic Waterfowl, Grey Teal Anas Gracilis, Across Inland Australia – Results from Satellite Telemetry Spanning Fifteen Months
    Movements of a nomadic waterfowl, Grey Teal Anas gracilis, across inland Australia – results from satellite telemetry spanning fifteen months D.A. Roshier1,*, N.I. Klomp1 & M. Asmus1 Roshier D.A., Klomp N.I. & Asmus M. 2006. Movements of a nomadic waterfowl, Grey Teal Anas gracilis, across inland Australia – results from satellite telemetry spanning fifteen months. Ardea 94(3): 461–475. We used lightweight satellite transmitters to follow the movements of 17 Grey Teal Anas gracilis between September 2003 and November 2004 in two contrasting landscapes, the agricultural districts of southern Australia and the desert landscapes of the interior. Tagged birds moved large dis- tances (up to 343 km) between occupied sites in a short period (hours), remained in the vicinity of those sites for extended periods (months), ven- tured up to 453 km from their point of release and travelled more than 2000 km in one year. We describe patterns of movement in a nomadic waterfowl for 15 months from September 2003, a period of severe drought. Based on the current analysis there appears to be no remarkable difference in the observed patterns of movement of those released in the agricultural landscapes and those released in the desert. As in waterfowl elsewhere, movements appear to occur in response to changes in local food abundance that threaten survival or the imperative to move in order to breed successfully. In Grey Teal, the proximate cues for movement transcend the local landscape and some birds are responding to temporary cues hundreds of kilometres distant. This is in contrast to the universal seasonal cues associated with migration systems else- where.
    [Show full text]
  • Phylogeny Biogeography, and Taxonomy of Australasian
    The Auk 117(1):154-163, 2000 PHYLOGENY, BIOGEOGRAPHY, AND TAXONOMY OF AUSTRALASIAN TEALS MARTYN KENNEDY 1 AND HAMISH G. SPENCER Departmentof Zoology,University of Otago,P.O. Box 56, Dunedin,New Zealand ABSTRACT.--Thetaxonomy of the Australasianteals has been particularly unstable. Aus- tralasianGrey Teal (Anasgracilis) and ChestnutTeal (A. castanea)are widely viewed asspe- cificallydistinct, but the taxonomyof theNew Zealandteals remains unsettled. Because con- servationstatus is affectedby taxonomicrank, it is importantto resolvethe statusof the rare subantarcticteals. To estimatephylogenetic relationships of teals,we sequencedthree mi- tochondrialDNA genes(12S, and ATPase6 and 8). The resultantphylogeny unequivocally groupsthe ChestnutTeal with the GreyTeal, rather than with the New Zealandteals as has traditionally been held (Fleming 1953). A greater level of sequencedivergence occurred within the New Zealandteals than betweenthe Grey and Chestnutteals. This diversity,to- getherwith morphologicaland behavioraldifferences, implies that the New Zealandteals shouldbe accordedspecific status as A. aucklandica,A. nesiotis,and A. chlorotis.Although it is most likely that the teal that colonizedthe AucklandIslands and CampbellIslands orig- inated in New Zealand, our data do not allow us to determine whether the ancestors of the CampbellIsland Teal came from mainlandNew Zealandor the AucklandIslands. This un- certaintyarises because, as our data show,the colonizationevents were separatedby a short period of time. Received25 November1998, accepted 16 June1999. F•VE EXTANT TEALS inhabit the Australasian 1990).The brown-plumagedteals (i.e. all teals region and provide an interesting example of exceptthe Grey Teal)all existin allopatry.The speciationin insularSouthern Hemisphere wa- Auckland Island Teal (A. aucklandica)and terfowl (see Livezey 1990). Grey Teal (Anas CampbellIsland Teal (A. nesiotis)occur only on gracilis),which are small and drab, are wide- their respectivesubantarctic island groups (see spreadthroughout Australia.
    [Show full text]
  • Conservation Status of New Zealand Birds, 2008
    Notornis, 2008, Vol. 55: 117-135 117 0029-4470 © The Ornithological Society of New Zealand, Inc. Conservation status of New Zealand birds, 2008 Colin M. Miskelly* Wellington Conservancy, Department of Conservation, P.O. Box 5086, Wellington 6145, New Zealand [email protected] JOHN E. DOWDING DM Consultants, P.O. Box 36274, Merivale, Christchurch 8146, New Zealand GRAEME P. ELLIOTT Research & Development Group, Department of Conservation, Private Bag 5, Nelson 7042, New Zealand RODNEY A. HITCHMOUGH RALPH G. POWLESLAND HUGH A. ROBERTSON Research & Development Group, Department of Conservation, P.O. Box 10420, Wellington 6143, New Zealand PAUL M. SAGAR National Institute of Water & Atmospheric Research, P.O. Box 8602, Christchurch 8440, New Zealand R. PAUL SCOFIELD Canterbury Museum, Rolleston Ave, Christchurch 8001, New Zealand GRAEME A. TAYLOR Research & Development Group, Department of Conservation, P.O. Box 10420, Wellington 6143, New Zealand Abstract An appraisal of the conservation status of the post-1800 New Zealand avifauna is presented. The list comprises 428 taxa in the following categories: ‘Extinct’ 20, ‘Threatened’ 77 (comprising 24 ‘Nationally Critical’, 15 ‘Nationally Endangered’, 38 ‘Nationally Vulnerable’), ‘At Risk’ 93 (comprising 18 ‘Declining’, 10 ‘Recovering’, 17 ‘Relict’, 48 ‘Naturally Uncommon’), ‘Not Threatened’ (native and resident) 36, ‘Coloniser’ 8, ‘Migrant’ 27, ‘Vagrant’ 130, and ‘Introduced and Naturalised’ 36. One species was assessed as ‘Data Deficient’. The list uses the New Zealand Threat Classification System, which provides greater resolution of naturally uncommon taxa typical of insular environments than the IUCN threat ranking system. New Zealand taxa are here ranked at subspecies level, and in some cases population level, when populations are judged to be potentially taxonomically distinct on the basis of genetic data or morphological observations.
    [Show full text]
  • Botulism Is a Paralytic Disease Caused by Ingestion of a Toxin Produced by the Bacterium Clostridium Botulinum
    Fact sheet Botulism is a paralytic disease caused by ingestion of a toxin produced by the bacterium Clostridium botulinum. Avian botulism can occur in any bird species, but is most frequently seen in ducks, geese, swans, ibis, egrets and pelicans. It occurs worldwide and is commonly reported in wild birds in Australia. The majority of birds that develop botulism will die if not treated. Toxin production by C. botulinum only occurs under specific environmental conditions. Most outbreaks of botulism occur in the summer and autumn and often occur repeatedly in the same environment. Large numbers of birds can die during outbreaks and this can contribute to local and regional population declines. Order: Clostridiales Family: Clostridiaceae Genus: Clostridium Clostridium botulinum is a Gram-positive, rod-shaped bacterium that produces environmentally resistant spores when faced with unfavourable conditions. It grows in environments where there is little or no oxygen. Clostridium botulinum isolates can produce any one of seven distinct types of neurotoxins (A-G). Most produce only one neurotoxin, but some isolates will produce multiple toxins. Clostridium botulinum isolates are also categorized into groups I-IV by their ability to use protein substrates for energy. Toxin production is generally group specific and Group III strains are associated with animal disease. Ingestion of the toxin causes the paralytic disease known as botulism. Waterfowl mortalities due to botulism are usually caused by type C toxin (or type C/D mosaic), although type E has caused sporadic mortalities among fish-eating birds (such as gulls) mainly around the Great Lakes in North America (Rocke and Bollinger 2007; Le Maréchal et al.
    [Show full text]
  • Hybridisation in the Last Remaining Individuals Of
    Records of the Canterbury Museum, 2017 Vol. 31: 159–165 © Canterbury Museum 2017 159 Hybridisation in the last remaining individuals of the extinct Fiordland population of Brown Teal (Anas chlorotis) Theresa L Cole1,2 and Jamie R Wood1 1Landcare Research, PO Box 69040, Lincoln 7640, New Zealand Email: [email protected] 2Department of Zoology, University of Otago, PO Box 56, Dunedin 9054, New Zealand The New Zealand endemic Brown Teal (Anas chlorotis Gray, 1845) was once widespread on the three main islands of New Zealand, some offshore islands and the Chatham Islands. Hunting and drainage of wetlands during the early years of European colonisation, however, resulted in a severely reduced range for the species and by 1990, the last remaining wild populations were on Great Barrier Island, and in eastern Northland and Fiordland. However, by 2007, the Fiordland population of Brown Teal was assumed extinct. The potential role of hybridisation with Mallard (Anas platyrhynchos Linnaeus, 1758) and Grey Duck (Anas superciliosa Gmelin, 1789) in the decline of the Fiordland population of Brown Teal has previously been recognised, though specimen details and tissue voucher samples associated with the DNA sequences were not retained. Here, we provide new mitochondrial DNA sequences from four specimens of Fiordland Brown Teal registered in the collections of Canterbury Museum. The results provide evidence for hybridisation with Mallard/ Grey Duck in all four individuals, and support previous suggestions that hybridisation could have played a role in the decline of the Fiordland Brown Teal population. Keywords: Conservation, genetics, Mallard, museum, voucher specimens Introduction The New Zealand endemic Brown Teal Anas( Teal were on Great Barrier Island, and in eastern chlorotis Gray, 1845), or pāteke, was formerly Northland and Fiordland (Gemmell and Flint widespread on the three main islands of New 2000).
    [Show full text]
  • Lead in Victorian Wetlands Study Preliminary Investigation
    Lead in Victorian wetlands s tudy P reliminary investigation Publication 1681 December 2017 Lake Martin, May 2017 Lake Martin, May 2017 1 Lead in Victorian wetlands study 2017 About this report This report has been prepared by Environment Protection Authority Victoria (EPA); published December 2017. EPA publication 1681 For further information, please contact EPA on 1300 372 842 (1300 EPA VIC) or [email protected] Translation service Translation: 131 450 2 Lead in Victorian wetlands study 2017 Contents List of figures and tables ................................................................................................................................................... 4 Glossary of terms .............................................................................................................................................................. 5 Executive summary ........................................................................................................................................................... 6 Project background ........................................................................................................................................................... 7 Objectives ......................................................................................................................................................................... 7 Methods ...........................................................................................................................................................................
    [Show full text]
  • Water Resource Unit Values & Water Quality Classification Standards
    Volume Three Appendix 5 Appendix 5 Water Resource Unit Values & Water Quality Classification Standards Abbreviations A aesthetic AE aquatic ecosystem C cultural CR contact recreation F fisheries FS fish spawning NS natural state SG shellfish gathering WS water supply Schedule 1 – Water Resource Unit Values No. Water Resource Unit Values Water Quality Classifications 1 Acheron (includes Fish habitat AE, FS, F, A Fish lake in the Alpine Galaxias, dwarf galaxias, koaro, northern flathead Wairau River galaxias, longfin eel, shortfin eel, tarndale bully and catchment) upland bully habitat. Only known habitat for tarndale bully. Brown trout/salmon spawning. Bird Habitat Wetland species, black-fronted terns, southern crested grebe, and banded dotterel. Paradise shelduck moulting site. Braided river birds. Aquatic Macrophytes Intact indigenous aquatic macrophytes community. Recreation Waterfowl hunting, fishing, canoeing, rafting and passive recreation. Public Access Large areas of catchment administered by Department of Conservation (DOC) but subject to lease constraints. Natural Character High. Significant Wetlands Tarndale Lakes - nationally significant wetlands complex. App 5 – 1 Appendix 5 Volume Three No. Water Resource Unit Values Water Quality Classifications 2 Cullens/Linkwater Fish Habitat AE, FS Complex Banded kokopu, shortjaw kokopu, red fin bully, common bully, īnanga, longfin eel and shortfin eel habitat. Invertebrate Habitat Kōura habitat. Riparian Habitat Intact indigenous forest in upper catchment. Coastal wetlands. 3 Anakoha Fish Habitat AE, FS Banded kokopu, shortjaw kokopu, dwarf galaxias, īnanga, giant kokopu, koaro, longfin eel and redfin bully habitat. Riparian Habitat Intact indigenous forest in upper catchment. Coastal wetland. 4 Are Are Fish Habitat AE, FS Black flounder, common bully, īnanga, lamprey, longfin eel, redfin bully, upland bully and shortfin eel habitat.
    [Show full text]
  • Grey Teal – Reviving a Spectacular Success Story Stopped Dead in Its Tracks
    Grey teal – reviving a spectacular success story stopped dead in its tracks Written by: John Dyer, Northern Wildlife Manager, Auckland Waikato Fish & Game Council. Background: In 2014 on behalf of all regional Fish and Game Councils, the Chief Executive of Fish and Game NZ wrote to the Minister of Conservation, Hon. Dr. Nick Smith, asking that he, “initiate a process within his department to make grey teal a designated gamebird”. To date, the Minister has simply stated his Department will look into it, when their resources allow. This is the same offer made by his Department in 2011 and by Smith’s predecessor, Hon. Kate Wilkinson, in 2009. In fact, the government has repeatedly suggested since 1959 that it would make grey teal a gamebird, but has yet to follow through. How did we get to this point? Where do we go to from here? Why is a status change needed? Grey teal, (Anas gracilis), are found primarily in Australia and New Zealand but also in New Guinea, Vanuatu and the Solomon Islands. They are a very abundant and stable species numbering 1.1 million overall, of which some 120,000 are found in New Zealand - about the same overall number as the NZ shoveler. The difference is that NZ shoveler have always been a gamebird in NZ, but grey teal have never been. This would come as a great surprise to Australian hunters who, for instance, in 2014 in the state of Victoria, have a 3 month long season and a 10 bird limit on grey teal. It is in fact one of the commonest ducks in Australian hunters’ bags and always has been.
    [Show full text]
  • Application to the Department of the Environment
    Application to the Department of the Environment For Re-Assessment of the Victorian Eel Fishery Against the Guidelines for the Ecologically Sustainable Management of Fisheries January 2019 1. Background In 2014 the Victorian Department of Primary Industries (now the Victorian Fisheries Authority (VFA)) sub-mitted an application to the Department of the Environment for the re- assessment of the Victorian Eel Fishery under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). The list of exempt native specimens was subsequently amended to allow export of product from the Victorian Eel Fishery to continue for a period of five years, until 17 April 2019. In 2017 the Victorian Eel Fishery Management Plan (the Management Plan) was developed which is intended as a blue print for future actions to the benefit of all users of the resource. The Management Plan is available on the VFA website: https://vfa.vic.gov.au/commercial-fishing/eels/victorian-eel-fishery-management-plan The Management Plan applies to the Victorian eel fishery and replaces the previous management plan (McKinnon 2002). It recognises the ongoing economic and social importance of all sectors, including commercial, recreational, traditional owner and conservation interests. It sets out strategies and management arrangements to achieve the objectives including an implementation plan and an evaluation and review process. 2. Key changes in the Victorian Eel Fishery since last assessment The Management Plan – The Victorian Eel Fishery is managed under the Victorian Eel Fishery Management Plan 2017 (the Management Plan) which was declared in September 2017. The main objectives of the Management Plan are: • Long term sustainability of eel resources, • Equitable resource access and use, • Cost effective and participatory management, and • Improving economic viability of the fishery.
    [Show full text]
  • Ecological Character Description of the Lake Gore Ramsar Site, Esperance, Western Australia
    ECOLOGICAL CHARACTER DESCRIPTION OF THE LAKE GORE RAMSAR SITE, ESPERANCE, WESTERN AUSTRALIA A report by the Department of Environment and Conservation Ecological Character Description of the Lake Gore Ramsar Site Acknowledgements Funding for the development of this document was sourced jointly from the Natural Heritage Trust (NHT) and the State and Commonwealth contributions to the National Action Plan for Salinity and Water Quality (NAP). NHT and NAP are jointly administered by the Australian Government departments of Agriculture, Fisheries and Forestry and the Environment, Water, Heritage and the Arts and the WA Natural Resource Management Office. In-kind contributions were gratefully received from the organisations represented on the Technical Advisory Group. Document Preparation This document has been prepared by the Wetlands Section of the Department of Environment and Conservation. Gareth Watkins - Author / conceptual models and graphics Jennifer Higbid - Internal review Expert Advice Steve Appleyard DEC Roger Jaensch Wetlands International Tilo Massenbauer DEC John Simons DAFWA Doug Watkins Wetlands International Technical Advisory Group Members Michael Coote DEC Robyn Cail South Coast NRM Ian Hartley Esperance Regional Forum Jennifer Higbid DEC Tegan Laslett DEC John Lizamore DEC Julie Patten DEC Ken Read Esperance Bird Observers Group John Simons DAFWA Thank you to the following people for their contributions Margaret Brock University of New England David Cale DEC Tracy Calvert DoW Nikki Cowcher DEC Henry Dabb South Coast NRM
    [Show full text]