The band is labeled with a tracking number, and there is a phone number on the band for people to call for free, to report a banded bird they've found or recaptured.
这只手环上有一个追踪号码,还有一个人们可以免费拨打的电话号码,举报他们发现或捕获的标记雀鸟。
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Britain's loudest bird, the bittern, has had its best year since records began with scientists tracking more than 100 breeding males belting out their distinctive booming call.