Method #3: Find a Monarch Roost
Monarch butterflies only migrate during the day. They come down to rest at night and cluster in roosts. Roosts may form for a single night or last for two weeks or more. They may have a handful of butterflies or far too many to count.

If you find a roost, try to estimate the number of monarchs that you see. Visit each night, record the number of days the monarchs stay, the wind direction and the weather. Observe and describe the butterflies' behavior and habitat carefully. Roosting is a mysterious behavior and much can be learned.