Conservationists say the decline in grouse is due to bad moorland management: it started before bird-protection laws in 1954 and recent reintroductions of predator species.
环保主义者们说，松鸡数量的减少主要是因为对沼泽地的管理不善——这番说辞在1954年鸟类保护法出台前就已出现，近日重新引入肉食猛禽后仍是如此。
Conservationists say the decline in grouse is due to bad moorland management: it started before bird-protection laws in 1954 and recent reintroductions of predator species.
环保主义者们说，松鸡数量的减少主要是因为对沼泽地的管理不善——这番说辞在1954年鸟类保护法出台前就已出现，近日重新引入肉食猛禽后仍是如此。
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