Distribution

Northern Australia, Northern Queensland, the Northern Territory, and north of Western Australia.

Identification

Alate: 20.00–21.00 mm long with wings; 11.50–12.00 mm without wings.

Generally, N. triodiae is larger than N. magnus.

Worker: 5.00–6.00 in length 

1. Head is dark chestnut brown in colour.
2. Clypeus and pronotum are pale yellow
3. Postclypeus a little less half as long as wide. 

Soldier: 4.25–4.75 mm in length.

This species is similar to N. magnus.

Compared to N. magnus:

1. Head is darker, and is almost spehiral when viewed from above. 
2. Rostrum is narrower; the colour varies sometimes the apical one-third is dark reddish-brown or sometime entirely dark brown. 
3. Legs are much longer
4. Antennae have 14 segments; 3rd segment longer than 2nd, about as long as 5th; 4th segment markedly longer than 3rd and 5th; 2nd and 3rd equally long, shorter than 5th.
5. Mandibles have long points. 

Habitat and Behaviour

This species is known for its nest building. Nasutitermes triodiae makes large size nests with various forms that depend in locality. Its nests reach a maximum height of about 4 metres and at ground level, a diameter of about 3 metres. Many of its nests re irregular cone or dome-shaped. Others are narrowed at the base, with distinct overhanging sided that often extend downwards to the ground.