Big-headed Ant

Natural history and identification

The big-headed ant tends honeydew-producing insects. Hawaiian research documents its association with pineapple mealybugs, including Dysmicoccus neobrevipes and D. brevipes. This relationship can protect sap-feeding pests and complicate biological control. Its presence should therefore be recorded alongside the attended insects, while avoiding an unsupported claim about the size of that effect at a particular Kauaʻi site.

Kauaʻi occurrence and evidence

Atlas occurrence category: Present — established. The Kauaʻi record is classified as “Present — established”. Its cited evidence source is U.S. Fish & Wildlife Service. Recorded at Kīlauea Point National Wildlife Refuge; island distribution and abundance remain incompletely mapped in this Atlas.

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

Pheidole megacephala

Common names

Big-headed Ant

Family

Formicidae

Order

Hymenoptera

Record type

species

Kauaʻi occurrence and status

Kauaʻi occurrence

Present — established

Origin

Introduced — invasive

Conservation status

Invasive ecosystem pest

Process and seasonal context

Seasonal description

Big-headed ant (Pheidole megacephala) is an invasive ant recorded on Kauaʻi. Large colonies displace native invertebrates and alter food webs, especially in sensitive coastal and seabird habitats.

Sources and further reading

• U.S. Fish & Wildlife Service
• Natural history and identification — species source