Common Chiffchaff (Phylloscopus collybita tristis)
Record shot of this rare for Taiwan, Common Chiffchaff (Phylloscopus collybita tristis), Tianliaoyang, Taiwan
The Siberian chiffchaff, breeds in Siberia east of the Pechora River and winters in the lower Himalayas. It is also regularly recorded in western Europe in winter, and it is likely that the numbers involved have been underestimated due to uncertainties over identification criteria, lack of good data and recording policies (Sweden and Finland only accept trapped birds). It is a dull subspecies, grey or brownish above and whitish below, with little yellow in the plumage, and the buff-white supercilium is often longer than in the western subspecies.
Source: Wikipedia
Common Chiffchaff (Phylloscopus collybita tristis)
Record shot of this rare for Taiwan, Common Chiffchaff (Phylloscopus collybita tristis), Tianliaoyang, Taiwan
The Siberian chiffchaff, breeds in Siberia east of the Pechora River and winters in the lower Himalayas. It is also regularly recorded in western Europe in winter, and it is likely that the numbers involved have been underestimated due to uncertainties over identification criteria, lack of good data and recording policies (Sweden and Finland only accept trapped birds). It is a dull subspecies, grey or brownish above and whitish below, with little yellow in the plumage, and the buff-white supercilium is often longer than in the western subspecies.
Source: Wikipedia