New Zealand’s unique ecosystems, including forests and grasslands, provide a habitat conducive to the survival of moth species like Harmologa speciosa.

[3][2] Like other Tortricidae, Harmologa speciosa is likely herbivorous in its larval stage, feeding on plant tissues and potentially contributing to leaf damage.

These moths can play a role in the food web, serving as prey for predators and hosts for parasitoids.

However, the specific ecological interactions and life cycle of Harmologa speciosa have not been extensively studied.

However, its restricted distribution emphasizes the importance of protecting its native habitats to ensure the survival of such endemic species.