Tropical hardwood hammocks in the Everglades have been harvested for lumber, particularly by shipbuilders seeking West Indian mahogany and black ironwood (Krugiodendron ferreum). The largest and most mature of these trees had been removed by the late 18th century.[39] Seminoles made their villages in hammocks in the late 19th and early 20th centuries; they lived in groups of chickees numbering half a dozen, with one central chickee for cooking and another for eating. Dugout canoes, cookware, stills, and sewing machines may still be found in remote locations.[45]