Early instar larvae of this species have a white body and black spines.

Mature larvae are characterized by an orange head topped by two black horns 1.2 cm long.
Their bodies are brownish pink, with black scoli (spines with multiple points) and black spots.
The caterpillars of H. cydno are known to form small groups, demonstrating social behavior.
Early instar larvae of this species have a white body and black spines.
Mature larvae are characterized by an orange head topped by two black horns 1.2 cm long. Their bodies are brownish pink, with black scoli (spines with multiple points) and black spots. The caterpillars of H. cydno are known to form small groups, demonstrating social behavior.
Heliconius cydno