CARPENTER ANTS IN TREES

Carpenter ants in trees are not a serious problem for the tree.  They do not eat or chew live wood, only dead or rotted wood.  Iowa State University has an excellent discussion of carpenter ants.   Just go to this web page:  

Copy and paste this link in your browser and read the discussion by their education and outreach people.

https://www.extension.iastate.edu/news/2009/jun/060503.htm