Ecological Risk Screening Summary - Dice Snake (Natrix tessellata) - High Risk

The dice snake (Natrix tessellata) is a largely aquatic snake associated with rivers, coasts, streams, lakes, ponds, and the surrounding terrestrial habitat. It is widely distributed across Europe and ranges into the Middle East and Asia. This species is in trade, although there is limited information about the volume of trade. N. tessellata has been introduced and become established along Lake Geneva, Switzerland. The introduction of N. tessellata is linked to the reduced abundance and lower body condition of the native N. maura. The History of Invasiveness is classified as High. The Overall Climate Match for the contiguous United States was High. The majority of the contiguous United States had high local matches. There were some small areas of low match in the Northwest and areas of medium match in the southwest and southeast. The Certainty of Assessment is Medium due to a lack of definitive statements in the impact information. The Overall Risk Assessment Category is High.