Japanese Carpenter Ant (Camponotus japonicus) — identification, habitat & look-alikes

The Japanese Carpenter Ant is an East Asian carpenter ant, not a native U.S. species. Its large, black forage in open ground and can look much like the Eastern Black Carpenter Ant seen across much of the eastern United States.

Appearance

Appearance: Workers are about 0.28–0.51 in (7–13 mm) long and black with fine brown hairs. Larger workers have more developed heads and thoraxes.

Look-alikes

Eastern Black Carpenter AntCamponotus pennsylvanicus

A large black carpenter ant outdoors in the eastern United States is more likely to be this native species. Location is a useful first check because a single photo may not reliably separate the two.

Why they get mixed upBoth species have large, mostly black workers in the same genus.

Where it lives

Typical habitats: open ground
parks and gardens
field edges
Range: It occurs in East Asia, including Korea, Japan, China, Mongolia, and the Russian Far East.
Preferred conditions: Colonies nest in soil in open places; excavated soil may collect around the entrance.

Behavior

Diet: Workers take nectar, sugary , and small animal prey or carrion.
Social life: They touch one another with their antennae and use blends of surface chemicals to recognize nestmates. Ants from another colony may be attacked.

Life cycle

Breeding season: Winged queens and males leave the nest for a ; a mated queen then starts a new colony.

Conservation

IUCN Red List: NENot EvaluatedNot yet assessed

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