Coconut Rhinoceros Beetle

Natural history and identification

The coconut rhinoceros beetle has four stages: egg, grub, pupa, and adult. The large adult bores into palm crowns; developing grubs use decomposing organic material. Crown feeding can produce characteristic cuts as damaged leaves unfold. Breeding material and living palms consequently play different roles in its life cycle. The Atlas's dated Kauaʻi occurrence evidence is separate from this general biology.

Kauaʻi occurrence and evidence

Atlas occurrence category: Present — active multi-location outbreak. The Kauaʻi record is classified as “Present — active multi-location outbreak”. Its cited evidence source is Kauaʻi Invasive Species Committee. First detected on Kauaʻi in May 2023; now detected from Hanalei to Kekaha. Adults bore into palm crowns and can kill coconut, royal, date, fan, and endemic loulu palms.

Account coverage

Published species details have been added. A complete Kauaʻi-specific account of identification, habitat, feeding, reproduction, and population trend is not yet established by the sources linked here.

Names and classification

Scientific name

Oryctes rhinoceros

Common names

Coconut Rhinoceros Beetle

Family

Scarabaeidae

Order

Coleoptera

Record type

species

Kauaʻi occurrence and status

Kauaʻi occurrence

Present — active multi-location outbreak

Origin

Introduced — invasive

Conservation status

Hawaiʻi pest for control

Process and seasonal context

Seasonal description

Coconut rhinoceros beetle (Oryctes rhinoceros) is a newly established invasive beetle on Kauaʻi. Adults bore into palm crowns, causing characteristic V-shaped cuts, severe damage, and sometimes tree death; infested green waste, mulch, soil, and compost can spread the pest.

Sources and further reading

• Kauaʻi Invasive Species Committee
• Natural history and identification — species source