Main characteristics

Coordinates: 43.07725 S 146.76871 E
No:9        (list of all attractions)
Address:Australia and Oceania, Australia, Tasmania, west from Geeveston, 4 km northeast of the Tahune Airwalk
Species:Mountain ash or swamp gum (Eucalyptus regnans F.Muell.)
Height:86.5 m
Diameter:3.90 m
Volume:219 m3

Next to the highest known eucalypt - Centurion in August 2008 there was discovered another tree giant - Triarius.

Triarius is an enormous eucalypt - swamp gum (Eucalyptus regnans F.Muell.), 86.5 metres high. The tree was discovered in August 2008 by Forestry Tasmania employees Mayo Kajitani and David Mannes while analysing the data provided by airborne laser equipment LiDAR. The tree was discovered together with the nearby Centurion - the highest eucalypt in the world.

Named after the triarii - wealthy and influential fighters in Roman legions.

Contrary to Centurion the height of Triarius was comparatively easy to measure from the ground with laser equipment. Diameter of the trunk – impressive 3.90 m (2).

Discovered forest giants were located in non-protected state forest but immediately were included in the list of protected trees.

This is lucky coincidence that Centurion has survived. Wildfires in 1934 spared just a few older trees in this area and passed on west side. In 1950 there was logging nearby and at that time this giant tree would not be spared. In 1966 and 1967 the forest close nearby was deliberately burned for later regeneration, in 1967 this turned into furious, devastating fires. This time fire passed the tree on east side (1).

These fires were a reason why the forest around the giants was not oldgrowth and thus – not protected. It was not expected to find any tall trees in this area.


See Triarius on the map of Australia!


  1. Welcome to the Centurion! Forestry Tasmania, 10 Oct 2008. Accessed 03.01.10.
  2. Giant Trees. Tasmania’s world class giants. Accessed 03.01.10.
  3. New series of Going Bush screens Sundays at 5.30pm Forestry Tasmania. Accessed 03.01.10.
  4. The world’s tallest hardwood tree. Australian Forest Grower, winter 2009. Accessed 03.01.10.
  5. Technology aids in record-breaking tree discovery. International Forest Industries, August 2009. Accessed 03.01.10.

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