The playground south of the Amphitheatre was built 1971, John Toovey, architect; equipment by SMP (Landscapes) Limited; maze panel designs by Banks and Miles. Moved to the lawn in 2003.
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 Primrose Hill Footbridge is a replacement of a suspension bridge of about 1842, one of the five put up in Regent's park by James Dredge, engineer. Another Dredge suspension bridge was replaced in 1864 by the Broad Walk Footbridge, located just east of the Zoo, following slippage of the canal bank. There was a gunpowder explosion on the canal in 1874 and further slippage of the banks occurred in 1879-80. The latter is more likely to have been the cause of the replacement of the Primrose Hill suspension bridge. In 1906 the Zoo expanded its premises north of the canal westwards up to the Primrose Hill footbridge, the boundary of the gardens passing along the centre of the bridge. Built 1874 or 1879-80, to plans by John Fowler, engineer. Deck replaced 1906 and around 1930. Grade II listed.
Immediately east of the Bird House there is a small single storey brick building. This was built in 1908 as a prosectorium (pathology and post mortem laboratory) for the Zoo's sanatorium, which stood in the yard behind the Bird House from 1909 to 1956.
