第一只是黄眉柳莺，次级飞羽暗色的基部及以黑色为中心的大覆羽留下的选择很少。

First warbler Yellow-browed, the dark bases to the secondaries and black-centred greater coverts leave few other options.

youdao

第一只是黄眉柳莺，次级飞羽暗色的基部及以黑色为中心的大覆羽留下的选择很少。

First warbler Yellow-browed, the dark bases to the secondaries and black-centred greater coverts leave few other options.

youdao