但是最近的研究却得出了难以反驳的结论：环保人士以及一些官方工作人员估计的结论是，孟加拉虎的种群数量在1200到1500只之间。
But the latest research is hard to refute: estimates by conservationists, and some officials, put the population at 1, 200-1, 500.
据估计，世界现存野生西伯利亚虎大约 400-500只，且最新的研究显示这一种群数量较为稳定。
There are an estimated 400 to 500 Siberian tigers living in the wild, and recent studies suggest that these numbers are stable.
眼看着泰塔娇莺的数量与2001年相比减了80%，如今鸟盟估计栖息某处的泰塔娇莺的种群数在60至130只。
With sightings of the bird down nearly 80 percent compared with 2001, BirdLife now estimates the species's population at somewhere between 60 and 130 individuals.
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