Chinese Alligator (Alligator sinensis), FMNH no. 38234. Field Museum of Natural History, Chicago. Conservation status: critically endangered. As its wetland habitat has been drained for agricultural use, this species comes into direct contact with the growing human population. The Chinese Alligator spends half the year underground in burrow systems that can cause agricultural drainage problems. Once abundant in the eastern Yangtze River system. The remaining population of less than 200 individuals (as surveyed in 1999) is restricted to a reserve and research centre in Anhui province and reintroduction efforts have been promising. However, the success of conservation efforts will be measured by how well alligators and humans can co-exist as habitat continues to disappear.