Marievale Bird Sanctuary is a protected area in Gauteng, South Africa. It is a Ramsar site about 15 km in size, and situated on the East Rand on the southern half of the Blesbokspruit wetland. The Blesbokspruit is a major perennial river in Gauteng which is flanked by extensive floodplains on either side. Nearby is the Suikerbosrand Nature Reserve.

In 1978, a reserve 524 ha in extent was established. This was further extended to 1,526.01 ha.

The Blesbokspruit wetland, in which the sanctuary is situated, is designated as an Important Bird Area. Almost 300 bird species frequent the wetland, according to the Wildlife and Environment Society of South Africa (WESSA), with the best time to visit being between spring and the start of summer.

Birds found at the wetland include:

In addition to birds, mammals have also been observed in the sanctuary:

• Blesbok
• Cape clawless otter
• Three species of mongoose
• Southern reedbuck
• Cape hare

Within the wetland phragmites, typha and juncus reeds can be found between the water pans. A grassland biome occurs near the eastern border.

There is a conference centre and 2 chalets in the sanctuary. There are four bird hides at the water pans (named Flamingo, Hadeda, Duiker and Shelduck) and a public picnic site in the reserve.

The flow of the Blesbokspruit has been hampered by the surrounding industries, i.e. gold mine tailings, sewage treatment plants, farmland expansion and urban development in some parts of the wetland, creating disjointed pans of water in the wetland. Previously the river had few reed beds and few open stretches of shallow water. With the profusion of vegetation like sedges, bulrushes, duckweed and reeds, and the dumping of several large sand embankments through urban expansion, the landscape has since changed, resulting in the reduction of suitable habitat on the river.

• Selection of species from the Marievale Bird Sanctuary
• 
  Red-knobbed coot
• 
  African swamphen
• 
  Spotted-necked otter
• 
  A moorhen family in the sanctuary
• 
  African darter
• 
  Lesser flamingo flock
• 
  Black-headed heron
• 
  Cape shoveler
• 
  Greater flamingo
• 
  Purple heron
• 
  White-throated swallow
• 
  Black crake
• 
  African rail
• 
  Greater striped swallow
• 
  Juvenile male Southern red bishop

• Media related to Marievale Bird Sanctuary at Wikimedia Commons