The bigheaded ant gets its name from the disproportionately large head of the worker, used to crack hard seeds and other prey. Colors of the bigheaded ant range anywhere from yellow to almost black, and many combinations in between. Bigheaded ants aren't as common to find inside, although they occasionally enter homes. They usually nest outside or under slabs. When they do enter the home, they tend to trail to protein-rich food sources like meats or peanut butter.