kelly-butterfield-sunset-bay-steward-and-holly-flanigan-fort-niagara-steward-pulling-invasive-water-chestnut-at-grindstone-marsh-in-selkirk-shores-state-park-matt-brincka-state-parks February 23, 2017 1388 × 924 On land and In Water: 2016 Invasive Species Removal Efforts Kelly Butterfield, Sunset Bay Steward, and Holly Flanigan, Fort Niagara Steward, pulling water chestnut (an aquatic invasive species) at Grindstone Marsh in Selkirk Shores State Park, photo by Matt Brincka, State Parks