黑蛇一种黑色，多为无毒蛇类，如北美黑游蛇属黑蛇和食鼠黑蛇。
Any of various dark-colored, chiefly nonvenomous snakes, such as the black racer or the black rat snake of North America.
1994年至1997年作者对安徽省皇甫山自然保护区的蛇类资源进行了调查，共发现蛇类11种，其中有毒蛇3种，无毒蛇8种。
By the survey of snakes in Huangfu Shan Natural Preservation Fields from 1994 to 1997, the author has found 11 kinds of snakes, in all with one to several specimens of each kind except T. stejnegeri.
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