Kara Bridgman Sweeney, director of the Southwest Regional Center for the Florida Public Archaeology Network in Pineland, speaks with a group of interested attendants about the Calusa Indian tribe at the headquarters branch of the Collier County Public Library in North Naples on Tuesday. The Calusa were a group of hunter-gatherers who once only hunted fish and lived in Southwest Florida from 500 B.C. to 1750. Sweeney brought pieces of American Indian pottery approximately 1,500 years old. Those attending also brought their own American Indian artifacts, including a shell hammer and a smoothed stone spearform.