堤燕;灰沙燕;
The sand martin is a brown bird with white underneath...
崖沙燕是一种褐羽白腹的鸟。
The sand martin is a brown bird with white underneath
The sand martin is a brown bird with white underneath.
It's their creative shape from Beijing Sand Martin traditional kite.
它的其造型创意来自北京传统的沙燕风筝.
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