从此以后，圣诞数鸟的活动年年举行，一直持续至今。

Since then, Christmas bird-watching was held every year. It has been continued to the present.

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到了1900年，有27名鸟类爱好者决定改用数鸟来代替对鸟类的捕杀。

By 1900, there were 27 bird lovers who decided to count birds instead of killing birds.

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提取的基因信息进一步证实，“摩亚”恐鸟以及重达半吨、高近10英尺的象鸟也就灭绝于数世纪前。

Genetic material was pinpointed for the giant moa and 10ft tall, half tonne elephant birds that died out hundreds of years ago.

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