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AntsHigh concern

Tawny Crazy Ant

Nylanderia fulva

Reddish-brown ants that run in erratic, zigzag patterns and swarm electronics.

In Florida, Tawny Crazy Ant (Nylanderia fulva) rates as a high concern. Rhino Pest Management, licensed (#JB242881) and insured, covers ant control throughout Florida's Treasure & Space Coast and holds a 5.0★ rating over 16 Google reviews. Free, no-obligation estimate: (772) 589-6842.

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Photo: Insects Unlocked (CC0) · Wikimedia Commons

How to identify it

About 3 mm, reddish-brown with a long, slender body and notably long antennae and legs. Move in fast, random directions — not in organized trails like most ants — giving them their 'crazy' name.

Where it hides

Soil, mulch, leaf litter, wall voids, and especially any dry cavity near heat — junction boxes, AC units, compressors and pool equipment.

Signs you have them
  • Erratic, fast-moving reddish ants with no clear trail
  • Massive numbers appearing suddenly — often millions
  • Dead ants piling up in and around electrical boxes and junction boxes
  • Colonies short-circuiting air conditioners, junction boxes and electronics
Why it matters

Tawny crazy ants are one of Florida's most damaging invasive pests. They swarm electronics causing costly short-circuit failures, displace native wildlife, and can overwhelm a property overnight. They also displace fire ants entirely.

Should I call today?

Yes, get it looked at promptly. Tawny Crazy Ant causes damage or health problems that compound while you wait, and the cost of that damage is the part that actually gets expensive — not the treatment. An inspection is free, so there's no reason to guess.

How Rhino treats it

Rhino treats the perimeter and harborage with non-repellent products and repeats on a close schedule to manage these fast-spreading colonies before they can rebuild.

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Tawny Crazy Ant guides

How to get rid of ants in a Florida kitchen

More ants

Ghost Ant

Tiny, fast, pale-bodied ants that trail across kitchens and bathrooms.

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Red Imported Fire Ant

Aggressive stinging ants that build dome mounds and swarm when disturbed.

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Carpenter Ant

Large black ants that tunnel into wood — slow structural damage like a termite.

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Scientific source

For the biology behind this page, the University of Florida's IFAS Extension publishes a detailed Featured Creatures profile of this species — free to read, and written by entomologists in this state:

Tawny Crazy Ant (previously known as Caribbean crazy ant) Nylanderia (formerly Paratrechina) fulva (Mayr) — UF/IFAS Extension
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