Phytogeographically, Moldova is split between the East European Plain and the Pontic–Caspian steppe of the Circumboreal Region within the Boreal Kingdom. It is home to three terrestrial ecoregions: Central European mixed forests, East European forest steppe, and Pontic steppe. Forests currently cover only 11% of Moldova, though the state is making efforts to increase their range. It had a 2019 Forest Landscape Integrity Index mean score of 2.2/10, ranking it 158th globally out of 172 countries. Game animals, such as red deer, roe deer and wild boar can be found in these wooded areas.Noted for its vivid portrayal of the lower Dniester river, Henryk Sienkiewicz's novel ''With Fire and Sword'' opens with a description of saigas as a way to highlight the story's exotic setting. Saigas are now extinct in Moldova and are a critically endangered species.