The last time I swang in this swing, I almost crashed into a barn swallow, he yelled.

“上一回我荡秋千，几乎撞上了谷仓的一只燕子。”他叫道。

Barn swallows were said to remove their feathers and hibernate in holes, or sleep through the winter at the bottom of lakes and rivers.

有人说家燕会脱掉羽毛在洞里冬眠，或者在湖泊或河流的底部以冬眠渡过整个冬天。

Upon closer examination the researchers found that 14 species of bird lived in both regions, including the barn swallow, great tit, great reed warbler, buzzard and Eurasian jay.

经过进一步调查，研究人员发现两地有14种相同的鸟类，包括家燕、大山雀、大苇莺、鵟、松鸦。