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| Chestnut Teal | |
|---|---|
| Name | Chestnut Teal |
| Status | LC |
| Status system | IUCN3.1 |
| Genus | Anas |
| Species | castanea |
| Authority | (Gmelin, 1789) |
Chestnut Teal The Chestnut Teal is a species of dabbling duck native to Australia, recognized for its chestnut-brown plumage in males and subtle mottling in females. It occupies coastal wetlands and estuaries and features in studies by ornithologists, ecologists, and conservationists across institutions such as the Australian Museum, CSIRO, Royal Botanic Gardens Victoria, and BirdLife International.
Described by Johann Friedrich Gmelin, the species falls within the genus Anas alongside relatives studied by Charles Darwin, Alfred Russel Wallace, and John Gould. Taxonomic work by Thomas Campbell Eyton and George Robert Gray refined its placement; molecular analyses by researchers at the University of Melbourne, University of Sydney, and Monash University compared mitochondrial DNA with Mallard relatives and other Anatidae like Northern Pintail and Green-winged Teal. Historic nomenclature appears in works by Joseph Banks, Daniel Solander, and François Le Vaillant, while conservation listings reference IUCN and Australian Government departments, including the Department of the Environment and Energy and state agencies such as the NSW Office of Environment and Heritage and Victoria's Department of Environment, Land, Water and Planning.
Adults exhibit sexual dimorphism noted in field guides by Petersen, Sibley, and Simpson & Day; males display chestnut-brown plumage with iridescent patches similar to plumage descriptions by John Latham and Nicholas Aylward Vigors. Females are streaked and mottled, a pattern compared in morphological studies referencing specimens in the Natural History Museum, Smithsonian Institution, and Australian National Wildlife Collection. Measurements and biometric data appear in papers from the Royal Society, CSIRO Publishing, and ornithological journals like Emu and The Auk. Plumage comparisons often cite historic plates by Edward Lear, John James Audubon, and William Jardine.
The species is primarily coastal, inhabiting estuaries, saltmarshes and lagoons across New South Wales, Victoria, South Australia, Tasmania, and southern Queensland, with range notes appearing in atlases from BirdLife Australia, Atlas of Living Australia, and eBird datasets curated by the Cornell Lab of Ornithology. Observational records involve organizations including the Australian Bird and Bat Banding Scheme, Royal Australasian Ornithologists Union, and local groups such as BirdLife Australia branches and the Victorian Wader Study Group. Habitat assessments reference Ramsar sites, Port Phillip Bay, Moreton Bay, Gippsland Lakes, and the Coorong, and management plans from agencies like Parks Victoria, NSW National Parks and Wildlife Service, and the Tasmanian Parks and Wildlife Service.
Foraging behavior as a dabbling duck has been documented in studies by CSIRO, universities including La Trobe University and Flinders University, and in comparative reviews in journals such as Biological Conservation and Wildlife Research. Diet analyses reference benthic invertebrate surveys conducted by the Australian Museum, Marine and Freshwater Research, and estuarine ecology reports involving the Commonwealth Scientific and Industrial Research Organisation. Predation and interspecific interactions involve species such as the Pacific Gull, Silver Gull, and introduced predators discussed in biosecurity reports by Biosecurity Australia and the Invasive Species Council. Seasonal movements and local dispersal have been tracked via banding programs, satellite telemetry projects run by the University of Tasmania and Victorian Bird Observers Club, and citizen science platforms like iNaturalist and eBird.
Nesting ecology, clutch size, and parental care have been the subject of field studies published by the Royal Society of Tasmania and avian life-history syntheses in journals such as Ibis and Emu. Nest sites are often in saltmarsh vegetation monitored in habitat restoration projects by Greening Australia, Landcare, and local councils including City of Sydney and Greater Geelong City Council. Reproductive timing coincides with seasonal hydrological regimes studied by the Murray-Darling Basin Authority and coastal managers; brood survival and juvenile recruitment feature in longitudinal surveys by BirdLife Australia and university research teams.
Assessed as Least Concern by IUCN, regional assessments by the Australian Government and state agencies note localized threats identified in recovery plans and environmental impact statements prepared for developments by NSW Department of Planning, Victorian Environment Protection Authority, and federal environmental approvals. Threat factors include habitat loss from coastal development, pollution incidents overseen by the Australian Maritime Safety Authority, and climate change impacts modeled by CSIRO and the Bureau of Meteorology. Conservation actions involve protected areas under the EPBC Act, wetland restoration funded by the Australian Government's National Landcare Program, and advocacy by groups like the World Wide Fund for Nature Australia and the Australian Conservation Foundation.
The species appears in community birdwatching lists compiled by BirdLife Australia, surveys conducted by the Australian Bureau of Statistics recreational fishing and birding reports, and ecotourism guides for destinations such as Kakadu, Phillip Island, and Wilsons Promontory. Cultural references and natural history accounts have been included in works by Australian naturalists like Tim Flannery, David Attenborough broadcasts, and regional field guides from CSIRO Publishing. Management and policy discussions have involved stakeholder groups including local councils, Indigenous ranger programs, and NGOs such as the Australian Marine Conservation Society.
Category:Anas Category:Birds of Australia