It was only in the late 19th century that the call for birdprotection began leading to the rising popularity of observations on living birds.
这仅仅是在19世纪后期，呼吁鸟维护开端招致地日益提高现生鸟类察看。
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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.