The Prairie Mar mot Enclosure was formed as a Coypu Pond and built with the Insect House to the north. At the time of its construction it was a novel display because it was free of bars or fencing. It was built 1912-13, with funding from Sir James K Caird. Relandscaped 1983.

Altered in 2003 to incorporate a large otter enclosure.

The Buildings of London Zoo