他补充道：“对于这起悲惨事故我们非常悲痛，它导致一只濒临灭绝的大猩猩的死亡。”
He added: "We are all devastated that this tragic accident resulted in the death of a critically-endangered gorilla."
居住在山区的大猩猩已濒临灭绝。
当时的人数甚至不及现在濒临灭绝的黑猩猩（21000头）和大猩猩（25000头）的有效种群大小（即能生育的个体数量）。
That number is smaller than current figures for the effective population size (or number of breeding individuals) for endangered species such as chimpanzees (21, 000) and gorillas (25, 000).
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