swallow, 'choir' . 燕子, “合唱團”

The quartet of chicks realised the birds in the centre of the group were more likely to get fed first by their mother, so they edged closer and closer together

Photographer captures moment a swallow 'choir' receive their supper | Mail Online
Read more: http://www.dailymail.co.uk/news/article-2702641/Open-wide-Photographer-waits-three-hours-capture-magical-moment-swallow-choir-wait-supper-barn-door.html#ixzz38KfGvSNu
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