Temognatha heros can reach a length of about 60–80 millimetres (2.4–3.1 in).

[3] The basic body colour is yellowish-orange, while pronotum is dark reddish.

Legs show a metallic blue color.

The adults feed on the flowers of various trees and shrubs (especially Eucalyptus leptophylla,[4] Eucalyptus foecunda, Melaleuca pauperiflora and Melaleuca uncinata.

[2][6] These beetles can be found in drainage basins and coastal and oceanic zones.