Paddys Rock Ephemeral Tarn

Description: A low turf ephemeral tarn on a broad ridge crest within the Rolling Hills land system. 1

Type/Class: Marsh. 2

Size: 0.7 ha.

Altitude: 580 - 600 m above sea level.

Approximate location: 9 km Northwest of the intersection of Ramrock Road and Townsend Road, Nenthorn.
NZTM (centre point): E1395480 N4956030.

Regional Plan: Water for Otago. Schedule 9 Regionally Significant Wetland, no.119, Map F59.

Territorial Authority: Waitaki District Council.


Interactive map of Paddys Rock Ephemeral Tarn

Recorded Values:




Habitat for nationally or internationally rare or threatened species or communities. Presence of threatened plant Tetrachondra hamiltonii on margin of tarn. 1


Scarce in Otago in terms of its ecological or physical character. Less than 15% of marshes remain in Otago. 2


High diversity of indigenous wetland flora and fauna. High plant diversity. The tarn contains the native herb Hypsela rivalis, Carex gaudichaudiana and club rush (Eleocharis acuta). 1

A2 - A4, A6, A8, A9

No relevant information is currently held by the ORC.


Other Information:

  • Composition of Juncus sp. 2
  • Listed in the Schedule of Areas of Significant Nature Conservation Value and Geopreservation Sites in the Waitaki District Plan. 12



1 Otago Regional Council (2004) Regional Plan: Water for Otago. Published by the Otago Regional Council, Dunedin.

2 Ausseil, A.G., Newsome, P., Johnson, P. (2008) Wetland Mapping in the Otago Region. Landcare Research Contract Report prepared for the Otago Regional Council.

94 Department of Conservation – Photo Archive.


Aerial View of Paddys Rock Ephemeral Tarn (March 2005)



Paddys Rock Ephemeral Tarn (April 2011)