Otherwise, you'll just be walking around with an empty plastic tube around your wrist.
Ants are fascinating creatures and highly social.
As such when you find one, you can bet the farm that there will be others nearby. The first place to look is near you home or apartment, under rocks, fallen logs, cracks in the driveway and the like. If you live in a college fraternity house, or almost any building near a university, you should be able to open any kitchen cabinet and find as many ants as you like. But I digress. Finding the ants is usually the least of your problems.