Prevention is the key when dealing with unwanted foragers like ants: Sealing up holes, making sure food is kept in sealed containers, and keeping a clean kitchen (with, ahem, no sticky spots) are top on the to-do list for keeping your house ant-free. PETA gives you the goods on ants’ diverse abilities and relationships, along with tips on humane ant control.
In some parts of the Caribbean and Central America, ant invasions are welcomed. Army ants, who travel en masse in a migratory fashion, sweep into houses and devour or chase away all the bugs they encounter—including cockroaches, centipedes, and earwigs—and then move on, leaving the house critter-free. Makes me wish army ants were the ones expanding their habitat into North America and not fire ants …