Fauna
Insect

Eastern Black Carpenter Ant

Camponotus pennsylvanicus

Also known as Black Carpenter Ant, Eastern Carpenter Ant

Eastern black carpenter ants establish massive colonies inside decaying timber, carving out smooth subterranean and arboreal galleries without actually digesting the wood. Major workers with oversized heads defend the nest and crush tough prey, while minor workers forage mostly at night along chemical trails for insect secretions and small invertebrates. Winged reproductives swarm during warm spring evenings to mate and found new colonies in moist, rotting trees.

NocturnalWood-DwellingSocial Insect
Eastern Black Carpenter Ant reference1 / 7
April Nobile / CC BY 4.0 · cc-by
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Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyAphid Honeydew, Small Caterpillars, Dead Insects
Predators
  • Woodpeckers
  • Toads
  • Jumping Spiders
ThreatsPesticide application, severe habitat loss, invasive ant competition
HabitatsDeciduous forests, woodland edges, suburban yards, decaying logs
Life spanQueens 10–25 years; workers 1–7 years
Classification
  1. OrderHymenoptera
  2. FamilyFormicidae
  3. GenusCamponotus
  4. SpeciesCamponotus pennsylvanicus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Defensive workers can inflict a painful pinch and spray formic acid when their nest is disturbed.
Why it is dangerous
Major workers possess powerful mandibles capable of pinching skin and spraying irritant formic acid into the wound.
How to recognize a risky encounter
Look for large, completely matte-black ants up to 2 cm long with fine yellowish abdominal hairs.
What to do
Avoid disturbing nest logs or chemical trails, and observe workers without placing hands near them.
Responsible observation
  • Spotting Trails: Look for active lines of workers traveling along tree branches or wooden structures after dusk.
  • Finding Nests: Search for piles of coarse wood shavings beneath old stumps or dead tree limbs.
  • Safe Observation: Watch foraging workers using a red-light filter to avoid startling them with bright light.
Related species
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