Formica pallidefulva
Pale Field Ant
Photo: "Formica pallidefulva" by Christina Butler, via Wikimedia Commons, licensed under CC BY 2.0.
🐜 At a glance
Origin: Eastern North America; grassland, woodland edges, lawns, parks
Nest temperature: 22–26°C; heater at 24°C in cool homes
Outworld temperature: 18°C night, up to 28°C day; by day like the nest or a degree or two cooler
Humidity: Nest 50–60%; outworld about 50%, never watered
Winter: Natural winter rest; steady 5–10°C only in a hibernation unit, or room temperature
Move to a nest: 10+ workers; 15–20 is better
Size: Queen about 9–11 mm; workers about 4–7 mm, golden to dark brown
Colony: One queen only; up to a few thousand workers
📖 About this species
A shiny, fast field ant from eastern North America, coppery gold in the south and dark brown in the north. Hardy and forgiving, with a big appetite for protein and sugar.
🍯 Feeding
Proteins: Protein Jelly (keep in the fridge) or Cricket Mash
Carbohydrates: organic Ant Honey or Ant Nectar, far better than sugar water or home-made mixes
Twice a week, small amounts, outworld only; remove leftovers after 2 days. Live food only for established colonies: scalded, cut in half, never for small colonies.
💧 Watering the nest
Distilled or purified water only. Never tap, rain or bottled mineral water, even boiled (mould and fungus).
Pipette a few drops through the watering hole; stop when 1–2 drops appear inside. About once a week, or when the meter drops below 50%.
Never water the outworld; keep it at about 50% humidity.
🏠 Setting up the ant farm
A7 Plus ant farm kit (built-in digital meter); A6 with Meter once the colony is big
Advanced Heating System Small 4W under one quarter of the nest, opposite the watering area, set to 24°C (in cool homes)
Daylight, never direct sunlight; away from windows, radiators, vibrations, speakers and kitchens
Escape risk: high. PTFE Fluon band on the top inner edge of the outworld lid, reapplied every 2–4 weeks
💡 Good to know
North American ant: not sold by Best Ants UK, may be illegal or impossible to import to the UK, and we don't encourage importing ants
No sting, but sprays a harmless puff of formic acid; sensitive to disturbance, so fuss as little as possible
Never release: it is not a UK ant. Can't keep it? See our ant adoption page
⭐ Golden rules | Never break these
🚫 Never put ants in a fridge, shed or garage, and never expose them to abrupt temperature changes.
🚫 Never use gel ant farms, Ytong or concrete nests, or DIY nests.
🚫 Never use tap, rain or mineral water, even boiled.
🚫 Never move a colony into a nest too early, and never tip or shake ants out of their tube.
🚫 Never release ants into the wild. If you can no longer keep a colony, visit our ants adoption page and ask us whether we can adopt it.
🛒 Recommended for this species
📚 These care notes cover the essentials only. Please read the full ant farm setup guide and our Formica pallidefulva care guide from A to Z. Questions? Message us through our contact form and we will be happy to help. 💚
Written and reviewed by the Best Ants UK team, keeping ants since 1997.