devolve
Image of Northern Leopard Frog drawn with watercolor pencil on soluble starch, suspended by human hair over petri dish of water. A species of special concern is any species of fish or wildlife that does not meet the criteria of an endangered or threatened species but is particularly vulnerable, and could easily become, an endangered, threatened, or extirpated species due to restricted distribution, low or declining numbers, specialized habitat needs or limits, or other factors.-- Maine Department of Inland Fisheries & Wildlife