一百多年前，一些海员将他们不再需要的鞍背龟丢弃在了伊莎贝拉岛沃尔夫火山附近的班克斯湾。
More than a century ago, it turns out, sailors dumped saddle backed tortoises they did not need into Banks Bay, near Wolf Volcano on Isabela Island.
科考队正在寻找最典型的鞍背龟：龟壳前部像马鞍一样隆起，确保象龟伸出长长的脖子，吃到高大的仙人掌。
The teams were looking for tortoises with the most prominent saddlebacks: shells rising up in front, like saddles, to accommodate the animals' extremely long necks for grazing on tall cactuses.
并且，鞍背龟也更容易被发现，因为穹背龟生活在高海拔地区，重量可达300磅，而鞍背龟在低海拔地区繁衍，以干燥植物为食。
They were also easier to find: Domed tortoises live at higher elevations and can weigh 300 pounds. Saddlebacks evolved at lower elevations and feed on drier vegetation.
并且，鞍背龟也更容易被发现，因为穹背龟生活在高海拔地区，重量可达300磅，而鞍背龟在低海拔地区繁衍，以干燥植物为食。
They were also easier to find: Domed tortoises live at higher elevations and can weigh 300 pounds. Saddlebacks evolved at lower elevations and feed on drier vegetation.
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