Every November, monarch butterflies arrive in Central Mexico by the hundreds of millions, clustering so thickly in fir forests they sometimes break the tree branches. Learn more about this amazing annual migration, as founder and director of Monarch Watch, Orley R. “Chip” Taylor, Professor Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, presents “Monarchs Wintering in Mexico: The big gamble” at 2 p.m. on Feb. 26 at the Kansas Wetlands Education Center. The program is free and open to adults and children.