If it is a half to three quarters of an inch long I agree that it looks like a carpenter ant. They like damp wood. I would try to find out why they like your house because if they are frequently seen you have damp wood somewhere. Check around windows, they like wet flashing areas above windows and spots that leak under windows. You canput out some sticky traps made to catch mice and they will get stuck. Sticky traps are cheap on Amazon.
Although an exterminator can take care of them, the ant baits are very effective as they carry the poison back to that nest and kill the queen, thus the nest.
Mac hasn't told us where he lives or any history on this problem, but (IMO) a first response for a DIY solution would be the Terro bait. I like the small bottle of liquid but have used the plastic traps where I didn't want the pets to accidentally get at it. But do keep it away from children and pets.
If it's a small pavement ant, I've been using a non-repellant indoor pesticide called Alpine WSG. Works similarly to Terro, except the active ingredient isn't borax. It's the indoor pesticide my pest control company uses when they spray twice a year (if I have an indoor sighting)
My trouble lately has been a single random ant crawls into my bathroom literally every morning. So strange that one ant shows up and then I don't see another until the next day. I've been spraying the Alpine but I don't know where exactly they're coming in from, so I'm guessing they're not taking bait.
some good replies, can I tell you what works 100%, Talc,
but the PROPER talcum powder, the one with actual talc.
Yes it's supposed to be carcinogenic but I've been around for 50 odd years and had it dusted all over me as a kid,
Had bad issues with ants, had a baby and didnt wanna use any chems.
so this is what I did, in my living area (mind you we had carpet) dusted plain old talc (NOT the medicated stuff either) left it for 24 hours, let the ants come and go.
Next day hoovered it all up, gone done and dusted. Had to do this twice only one year since then (5 years now) NOTHING
Apparently the ants ingest it and or take it back to there nest and they ingest it, but it kills them SLOWLY in there nest
Talc also smells nice especially after you hoover the carpet up, am sure it would work on wood or tile, but may be a bit slippery, so watch out
have even done this outside in summer
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