EAST ALTON – The National Great Rivers Research and Education Center (NGRREC) will welcome naturalist Mark H.X. Glenshaw, widely known for his work with great horned owls in St. Louis’ Forest Park, for an upcoming STREAM Series event, Oct. 15.Glenshaw’s presentation, “Forest Park Owls: Hiding in Plain Sight,” will go from 5-7 p.m., and include stories and insights from nearly two decades of studying the park’s owls. His presentation will highlight the fascinat...