Missouri status is determined by the Department of Conservation under Constitutional authority. Rule 3CSR10-4.111 of the Wildlife Code of Missouri and certain state statutes apply to state listed species. Definitions Endangered - one whose prospects for survival within the state are in immediate jeopardy. Rare - one that is present in small numbers. If its environment worsens, its continued presence in the state may become endangered.
Many species listed here are present in substantial numbers in other parts of their range.
They are listed because their presence enriches and diversifies the state's environment. Status Undetermined - one that may be rare or endangered, but about which there is not enough information available to determine its status. Watch List - one that is not currently rare or endangered, but has a restricted distribution or has experienced sufficient decline to indicate it may soon become rare or endangered. Extirpated - one that formerly occurred in Missouri, but is not now known to exist within the state. Extirpated species still occur somewhere in their natural range outside of Missouri.