Automeris caterpillar

Rarity: ⭐⭐⭐

Conservation status: Not Evaluated

🕰 Active Time: ☀️Diurnal

The caterpillar of Automeris belti is a striking and highly defensive larval stage of a Central American moth, covered in branching venomous spines capable of delivering a painful sting. Despite its bright green coloration, it is not harmless — this species uses both warning signals and chemical defense to deter predators.

🌍 `Range`

Automeris belti is found throughout Central America, including Costa Rica, Nicaragua, Honduras, and Panama. In Costa Rica, it is commonly found in: rainforests, forest edges, secondary growth areas, rural and garden environments.

🌙 `Behavior`

Highly defensive and visually conspicuous, the caterpillar relies on venomous spines for protection rather than camouflage alone. When threatened, it may remain still or slightly arch its body, exposing its spines. Younger larvae tend to cluster together, increasing their defensive effect.

Feeds on a wide variety of plant leaves.

🐣 `Reproduction`

Eggs are laid in clusters on host plants. Caterpillars hatch and pass through multiple growth stages (instars). Each stage increases spine development and toxicity. Eventually pupates in leaf litter or soil before emerging as a moth

🕰 Lifespan

Egg stage: ~1–2 weeks
Larval stage: ~3–5 weeks

🧪 `Venom`

This caterpillar venomous spines connected to small toxin glands. When touched, these spines break off into the skin and release venom, causing an immediate reaction.

💥 Pain level: moderate to strong (3/5 similar to or worse than a bee sting)

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