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October 23, 2026
Ghost ants vs. big-headed ants: South Florida ant ID
Short answer: Ghost ants are tiny, with a dark head and a pale, almost see-through body and legs, and they usually trail along kitchen counters, sinks and bathrooms. Big-headed ants are small reddish-brown ants; some workers have an oversized head, and they leave little piles of loose soil along patios, slabs and baseboards. Both are common in South Florida homes, and both are best handled by finding and treating the colonies rather than spraying the trail.
Ants are one of the most common calls we get across Palm Beach County, from Lantana and Lake Worth Beach to Wellington and Jupiter. Two of the most frequent are ghost ants and big-headed ants. They’re both small and they both come indoors, but they act differently, and knowing which one you have helps you treat it the right way.
Ghost ants at a glance
- Size: tiny, roughly 1.3 to 1.5 mm
- Look: dark head and thorax, with a pale, almost translucent abdomen and legs. They can be hard to see on light countertops.
- Where you see them: kitchen counters, sinks, bathrooms, inside walls and around potted plants
- What they eat: sweets and other foods; they’re often drawn to moisture
- Behavior: fast, erratic trails. Colonies can split off to form new colonies (called budding), so one home can have several.
Our existing post on small ants in the house covers ghost ants in more detail.
Big-headed ants at a glance
- Size: small, a bit larger than ghost ants
- Look: reddish-brown to dark. Some workers (called majors) have a noticeably large head compared to their body.
- Where you see them: along slab edges, patios, pool decks, driveways and baseboards
- Signs: small piles of loose soil or sand pushed up along concrete joints and the edges of pavers
- Behavior: large outdoor colonies that forage indoors along the foundation
See our post on big-headed ants in South Florida for more.
Quick comparison
| Ghost ants | Big-headed ants | |
|---|---|---|
| Color | Dark head, pale body | Reddish-brown to dark |
| Telltale sign | Tiny trails at sinks and counters | Soil piles along slabs and pavers |
| Usual nest | Inside walls, potted plants, under items outdoors | In soil outdoors, under slabs and pavers |
| Indoors? | Often | Usually along baseboards near the outside |
Why spraying the trail doesn’t work
It’s tempting to wipe or spray the ants you see. But the ants on the trail are a small part of the colony. Spraying can scatter them, and with ghost ants it can encourage the colony to split into new ones. That’s why ant problems often come back after store-bought sprays.
What helps
- Clean up food and moisture. Wipe counters, store sweets in sealed containers and fix leaks under sinks.
- Trim plants away from the house so branches don’t act as bridges.
- Don’t over-mulch against the foundation.
- Note where the trails go. This helps a technician find the colony.
- Get a targeted treatment. We trace trails back to the nest, focus on the exterior where most colonies start, and treat inside only where it’s needed.
Learn more on our ants page and our residential pest control page.
Frequently asked questions
Are ghost ants harmful?
They’re mainly a nuisance. They can get into food, so keep things sealed and wipe up spills.
Why do I see ants after it rains?
Heavy rain can flood outdoor nests and push ants inside looking for dry ground and food.
Do big-headed ants bite?
They’re not known as aggressive biters, but they can be a nuisance in large numbers.
Will ant baits from the store work?
Sometimes, but results vary by species and placement. A professional inspection identifies the ant and the best approach.
Do you offer complimentary inspections for ants?
Yes. Call (561) 725-5274 or book on our contact page.
Request a complimentary inspection
Book a complimentary inspection and we’ll share what we find, explain your options and recommend a plan for your home.
Request a complimentary inspection: qandlpest.com/estimate · (561) 725-5274
Office hours: Mon–Fri 8:00 AM–4:00 PM.
Inspect first. Treat smart.
About the author
Michael Ringler, Q and L Pest Management. Q and L Pest Management is a family-owned pest control company based in Lantana and serving Palm Beach County.Q and L Pest Management LLC holds FDACS Pest Control Business License #JB333443. Services are performed under FDACS Certified Pest Control Operator John Park, certificate #JF320165.