Lake Muir in October 2010
|Primary outflows||Deep River|
|Catchment area||38,400 hectares (94,888 acres)|
|Max. length||12 kilometres (7 mi)|
|Max. width||3 kilometres (2 mi)|
|Surface area||400 hectares (988 acres)|
|Surface elevation||170 metres (558 ft)|
Lake Muir is a lake, with a larger surrounding wetlands area, in the South West region of Western Australia, often known as the Lake Muir - Unicup System. It lies near the Muirs Highway North of Walpole and south-east of Manjimup and is 46 km2 in area.
Flora and fauna
A 14 km2 section of the wetlands has been identified by BirdLife International as an Important Bird Area (IBA) because it is thought to provide habitat for 10 or more pairs of endangered Australasian Bitterns.
Historically the area was a Game Reserve, with a duck shooting season. The Department of Environment and Conservation (CALM) started monitoring the wetlands system in 1980 in order to manage the duck shooting.
On 5 January 2001 a 106 km2 area was designated, under the Ramsar Convention as Ramsar site 1050, a wetland of international importance, acknowledging its rich ecological diversity.
In October 2005, evidence of damage to the wetlands area was published:
"…clearing of the land, and agriculture, have resulted in changes to the natural ecological processes in the waterways, and threaten the Muir-Unicup system."
- "Bonzle Digital Atlas – Map of Lake Muir". 2009. Retrieved 2009-03-02.
- "Information Sheet on Ramsar Wetlands - Muir – Byenup System, Western Australia". 2003. Retrieved 2009-03-02.
- "IBA: Muir-Unicup Wetlands". Birdata. Birds Australia. Retrieved 2011-08-22.
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