The Kentucky State Nature Preserves Commission has updated and revised the lists of rare and extinct or extirpated biota last published in 2000 and updated in 2001, 2004 and 2005 based on a standard methodology now utilized by NatureServe. Natural communities have been included in this update. The newly revised lists include one lichen, 387 vascular plant and lesser taxa, 346 animal taxa, and 36 natural communities considered rare. Nineteen plant and 47 animal taxa are considered extirpated or extinct from Kentucky.