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Colin Bibby 《Bird Study》2013,60(2):103-109
Within the next decade the Red-backed Shrike may cease to exist as a British breeding bird. The picture painted by this latest survey of its status is a gloomy one. It would appear that the combined pressures of an adverse climatic trend, the fragmentation of its habitat in the name of ‘development’, and not least over-collecting of its eggs, have reduced the population to a dangerously low level. 相似文献
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L. A. Batten 《Bird Study》2013,60(3):157-164
Inland roosts did not show increased numbers during spring migration, and midsummer roosts of non-breeders proved less extensive than had been supposed 相似文献
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