Entomology (Study of Bugs)/What type of ant?



Another ant
Another ant  
Having moved into a new home, I've been encountering large ants (3/4 inch or larger) that I've never seen before in this area (I live in Los Angeles, CA). These ants are black and so far I've only seen individual ants roaming around. I would appreciate any input on what I might be dealing with. Thank you!

Hi Roza,

You have carpenter ants, which can bore into wood in your house. They might also just be scavenging for food and not nesting, but it might be best to get some ant bait as soon as possible. Raid makes a good one. The ants will be attracted to the bait, eat it,and carry the poison back to their nest where they will die and many of their buddies will also die. If they are making nests in your home, this can indicate that you have water damaged or rotting wood.

Good luck.


Entomology (Study of Bugs)

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Jessica Mellinger


I can answer questions about invertebrates native to California, including insects commonly found in homes. If you have an identification request, please attach a photo to your question.


I was involved in collection and identification of invertebrates for the United States Geological Survey, Biological Resources Division for six years. Also, I provided these same services intermittently for the UC Davis John Muir Institute of the Environment for many years. I have been a member of AllExperts.com since 2009.

Department of the Interior: United States Geological Survey, Davis Field Station; University of California, Davis Aggie Alumni Association; UC Davis Center for Neuroscience; U.S. Department of Veteran's Affairs

I have two B.A.'s from the University of California, Davis and two Associate's degrees from Sacramento City College.

Awards and Honors
Special Thanks for Achieving Results award from the Department of the Interior

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