A viceroy butterfly is pictured.

Photo by Mike Briner

Nature Time programs for preschoolers are back at Muscatatuck National Wildlife Refuge, 12985 E. U.S. 50, Seymour.

The next class will be from 9:30 to 11 a.m. Wednesday on the back porch of the refuge’s visitor center. The subject will be butterflies.

The public is invited.