n.黑蛇；虎蛇；皮鞭

North American blacksnake(Elaphe obsoleta) that resembles the black racer. 黑錦蛇：一種北美黑蛇（黑錦蛇），與黑蛇相似

Black racer:a North american blacksnake (Coluber constrictor) commonly found in the eastern United States. 黑脊游蛇:北美產(chǎn)一種黑蛇(黑游蛇),一般于美國(guó)東部發(fā)現(xiàn)。

North American blacksnake(Coluber constrictor) commonly found in the eastern United States. 黑脊游蛇：北美產(chǎn)一種黑蛇（黑游蛇），一般于美國(guó)東部發(fā)現(xiàn)

A bluish-green, harmless variety (Coluber constrictor flaviventris) of the blacksnake, found in the central United States. 青色游蛇：青綠色，無(wú)毒的黑蛇（黃腹黑游蛇黑蛇屬），在美國(guó)中部被發(fā)現(xiàn)

A bluish-green, harmless variety(Coluber constrictor flaviventris) of the blacksnake, found in the central United States. 青色游蛇：青綠色，無(wú)毒的黑蛇（黃腹黑游蛇黑蛇屬），在美國(guó)中部被發(fā)現(xiàn)