Mexico's Santa Catalina Island rattlesnake has been classified as critically endangered on the 2007 IUCN redList.
墨西哥圣塔卡特·莱那岛响尾蛇在2007受威胁物种红色名录中被列为极危动物。
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The first potential future change would modify the unacknowledged packet list so that it is organized with an index as a red-black tree instead of the current linear list.