Instructions
Locate an area with a large concentration of fireflies. To have the best chance of chasing one down, the more you can find grouped together, the better.
Notice the way the fireflies fly in the group. Observing group behavior of these beetles can be very interesting and can help you catch one.
Follow one firefly with your eyes as long as possible, observing its flight patterns. When you can no longer follow one, find another. This will help you understand how they move before you start your chase.
Follow calmly after the firefly of your choosing until you are within capturing range.
Place the fingers of one hand across the fingers of the other, with the heels of your hands together to form an open pocket.
Move this pocket around a firefly and gently close your hands around it.
Open your hands back up once the firefly has landed on your hand, and allow it to walk around until it chooses to fly on.