Formica fusca

Formica fusca is where many beginners graduate to once they’ve had a season with an easier species. These glossy, dark ants are fast and bold, sprinting around the outworld and making for genuinely exciting foraging displays. They’re not difficult, but they ask a little more of you than a Lasius.

Keeping notes

Founding is semi-claustral: the queen benefits from small amounts of food while raising her first workers, so offer a drop of sugar water and a fragment of insect every few days during founding. Once established, colonies are active, curious, and quick — an outworld with plenty of space keeps them engaged.

They tolerate normal room temperatures well and, like other natives, need a winter hibernation. Their speed makes them a favourite for keepers who found Lasius a bit sedate.

Watch for

• Speed — they’re fast, so open the setup carefully and keep barriers immaculate.
• Semi-claustral founding means slightly more hands-on than fully claustral beginner species.
• Bold foragers that make the outworld the main event.