pilot blacksnake黑蛇,虎蛇(一种黑色,多为无毒蛇类,如北美黑游蛇属黑蛇和食鼠黑蛇)
water moccasin噬鱼蛇(一种有毒水蛇)
dimondback rattlesnake菱背响尾蛇（产于美国西南部）英语解释如下 :either of two large and deadly rattlesnakes (Crotalus adamanteus of the southeastern United States and C.atrox of the south central and southwestern United States and Mexico) called also diamondback,diamondback rattler.