The forewings show a black dot pattern, the hindwings are dark grey, sometimes also colourless or light green.

Valanga irregularis is native in the tropic and subtropic regions of Australia, northward of Sydney.

[3] The feeding takes place all night long and they remain hidden behind branches during hot and rainy days.

[5] Adult individuals are good jumpers and can defend against predators like mantises (Mantodea) or lynx spiders with the spines on the hindlegs.

Moreover, Valanga irregularis is well camouflaged as the body colour resembles the plant stem and leaf they are hiding behind.

However, under favourable conditions, they may set up in small groups and may cause damage as for instance on young coffee berries.

[2][3] The initial 5 millimetres long nymphs hatch and leave the duct with the first heavy rainfall.

The Latin byname "irregularis" means "irregular" and indicates the diversity of colour within this species.