Almost half of the bird species that breed in Britain leave for the winter, sometimes travelling prodigious distances.
几乎有一半在英国繁殖的鸟类要冬徙，有时飞越的距离相当惊人。
2
Or it could be caused by the higher temperatures that now prevail in northern areas, allowing beetles to breed more often in summer and survive in greater Numbers through the winter.
或者，可能是因目前北部普遍存在的高温，使甲虫常常在夏天繁殖和在冬季幸存的数量都更多了。
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Pumas can breed all year but usually in winter they slow down -- this year because of the warm weather we will see Puma 'kittens' two months early, " Kozlov said.