The Great Backyard Bird Count (GBBC) is coming up Saturday and Sunday, Feb. 16-17 at Acton Nature Center. Master Naturalist Billy Teels and the folks at Acton Nature Center will be on hand to oversee activities for the GBBC. The walks at the nature center will be at 7 a.m. both days. Each lasts about 2 1/2 hours. On Saturday, Feb. 16 Teels will also give a presentation on “Warblers, Butterflies of the Bird World,” at the Acton Library at 10 a.m.