19/06/2026
Fun Fact Friday: Carpenter Ants
Think you have carpenter ants? Not all big black ants are the same!
Carpenter ants are among the largest ants found in Michigan, often ranging from 1/4" to 1/2" long. Because of their size and color, they're commonly mistaken for other black ant species.
How to Tell a Carpenter Ant Apart
• Larger than most common household ants
• Rounded, evenly curved thorax (their back appears smooth when viewed from the side)
• One small node (bump) between the thorax and abdomen
• Elbowed antennae
• Fine gray or silver hairs on the abdomen, which can give the rear end a slightly shiny or frosted appearance in the light
• Termites have straight antennae and a thick waist, making them easy to distinguish from carpenter ants
**Here's the Interesting Part...**
Unlike termites, carpenter ants do **not** eat wood. Instead, they excavate it to create galleries and nesting areas. Because of this, carpenter ants are often attracted to wood that has been damaged by moisture, leaks, or decay.
**Signs You May Have Carpenter Ants**
• Large black ants inside the home, especially at night
• Small piles of sawdust-like material called "frass"
• Ant activity around decks, tree stumps, firewood, or damp wood
• Increased activity in spring and early summer as colonies expand
Fun Fact
A mature carpenter ant colony can contain thousands of ants and may establish multiple satellite nests throughout a property. This is one reason carpenter ants can be difficult to eliminate. Treating only the ants you see may not address the main colony or satellite nests hidden elsewhere.
If you're seeing large black ants around your home, take a closer look. Their size, smooth, curved back, and silver-gray hairs on the abdomen can help you determine whether you're dealing with carpenter ants or just another ant species.