极北柳莺 （ Arctic Warbler ），体小（12厘米）的偏灰橄榄色柳莺。具明显的黄白色长眉纹；上体深橄榄色，具甚浅的白色翼斑，中覆羽羽尖成第二道模糊的翼斑；...
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双斑绿柳莺 Two-barred Warbler Phylloscopus plumbeitarsus 极北柳莺 Arctic Warbler Phylloscopus borealis 黄腰柳莺 Pallas's Leaf-Warbler (Lemon-rumped Warbler) Phylloscopus proregulus ..
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黄眉柳莺 黄眉柳莺 Phylloscopus inornatus Yellow-browed Warbler 极北柳莺 极北柳莺 Phylloscopus borealis Arctic Warbler 双斑绿柳莺 双斑绿柳莺 Phylloscopus plumbeitarsus Two-barred Greenish Warbler ..
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在我看来大多数的极北柳莺似乎有黄土色的脚，且眉线没有到达喙。
The majority of Arctics to my eye seem to have ochre-toned legs, and the supercilium does not reach the bill (which can be very hard to judge in the field).
莺：极北柳莺，翼带可能磨损，没问题。有几只暗色脚的在春季时经过。
Warbler: Arctic, wingbars can wear off no problem. Several dark-legged birds came through in spring.
在这两张照片中，眉斑看来皆往前延伸到嘴喙的基部，这点便和极北柳莺不同。
In both photos, the supercilium appears to reach the bill base, pointing away from Arctic.
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