Benger Swamp
Lake in Western Australia
title: "Benger Swamp" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["wetlands-of-western-australia", "nature-reserves-in-western-australia", "birdwatching-sites-in-australia", "swan-coastal-plain", "important-bird-areas-of-western-australia"] description: "Lake in Western Australia" topic_path: "geography/australia" source: "https://en.wikipedia.org/wiki/Benger_Swamp" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Lake in Western Australia ::
::data[format=table title="Infobox body of water"]
| Field | Value |
|---|---|
| name | Benger Swamp |
| image | Oxyura australis 1.jpg |
| alt | A rust-coloured duck with a black head and a bright blue bill floats on dark water |
| image_size | 280 |
| caption | The swamp supports globally important numbers of the blue-billed duck |
| pushpin_map | Australia Western Australia |
| pushpin_map_alt | A map of Western Australia with a mark for Benger Swamp |
| pushpin_label_position | top |
| pushpin_map_caption | Location in Western Australia |
| location | Swan Coastal Plain, Western Australia |
| coords | |
| type | Swamp |
| outflow | Groundwater; evaporation |
| basin_countries | Australia |
| designation | Benger Swamp Nature Reserve |
| length | 2.8 km |
| width | 1.75 km |
| area | 580 ha |
| max-depth | 0.8 m |
| elevation | 15 m |
| mapframe | yes |
| mapframe-zoom | 12 |
| :: |
| name = Benger Swamp | image = Oxyura australis 1.jpg | alt = A rust-coloured duck with a black head and a bright blue bill floats on dark water | image_size = 280 | caption = The swamp supports globally important numbers of the blue-billed duck | pushpin_map = Australia Western Australia | pushpin_map_alt = A map of Western Australia with a mark for Benger Swamp | pushpin_label_position = top | pushpin_map_caption = Location in Western Australia | image_bathymetry = | caption_bathymetry = | location = Swan Coastal Plain, Western Australia | coords = | type = Swamp | inflow = | outflow = Groundwater; evaporation | catchment = | basin_countries = Australia | designation = Benger Swamp Nature Reserve | length = 2.8 km | width = 1.75 km | area = 580 ha | depth = | max-depth = 0.8 m | volume = | residence_time = | shore = | elevation = 15 m | islands = | cities = | mapframe = yes | mapframe-zoom = 12
Benger Swamp is a wetland located on the Swan Coastal Plain, in south-west Western Australia.
The wetland is situated 2 km west of Benger, 14 km east of the coastal town of Binningup, 12 km south-west of Harvey, and 155 km south of Perth. Some 89% of the swamp is protected within the Benger Swamp Nature Reserve, while the remaining 11%, mainly in the northern part, is privately owned. It is a seasonally important site for waterbirds and is classified by BirdLife International as an Important Bird Area, with special regard to the conservation of freckled ducks and Australasian bitterns. Water levels in the swamp are controlled artificially and are managed both for waterbird conservation and for farming.
Description
The swamp lies in a depression on the Pinjarra Plain, part of the Swan Coastal Plain. The soils are friable, dark grey loams overlying clays. To the west of the swamp are low ridges formed by wind erosion of the swamp surface when dried out in summer. Salinity measurements indicate that the swamp is a lens of fresh water overlying a saline water table.
Flora
Some 20% of the swamp is covered by Melaleuca trees and scrub, mainly on the northern and eastern edges. Of the four species there, Melaleuca rhaphiophylla (swamp paperbark) occurs as a dense low forest up to 10 m in height, while Melaleuca viminea, M. laterita and M. scabra are shrubs. Half the swamp is covered by stands of the introduced bulrush Typha orientalis. Baumea articulata (jointed rush) sedgeland covers about 1% of the swamp area. Flooded areas are dominated by couch grass (Cynodon dactylon) and water couch (Paspalum distichum).
Fauna
As well as freckled ducks and Australasian bitterns, other wetland bird species for which the swamp is an important site include the Pacific and white-faced herons, white and straw-necked ibis, swamp harrier, purple swamphen, hardhead, spotless crake, wood sandpiper, Australian reed-warbler, little grassbird and blue-billed duck.
Native mammals include western grey kangaroos and rakali. Tiger snakes are common, as are introduced animals such as foxes, cats and rodents.
Threats
The stands of Typha dry out during the hot-dry summers of the region, providing fuel for bushfires which destroy the Melaleucas that provide moulting and breeding habitat for freckled ducks.
References
References
- "IBA: Benger Swamp". Birds Australia.
- (1987). "Benger Swamp Nature Reserve management plan 1987-1992". Dept. of Conservation and Land Management.
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::