English: Wood Warbler
Russian: Пеночка-трещотка         
Mongolian: Тарчигнаа дуучшувуу
German: Waldlaubsanger
French: Pouillot siffleur 
Japanese: モリムシクイ (Mori-mushikui)      

Body length: 11-12 ½ cm.

Breeds mainly in closed wood. Favoured habitats beech wood with at least sprinkling of younger trees, oak forest, generally with minimal undergrowth (in N Europe, also mixed spruce and deciduous forest). Summer visitor (in Britain mid Apr-Aug; rare Ireland), winters in tropical Africa. Rather unobtrusive in habits, but not shy.

Identification: Size of Willow Warbler and similarly elongated in shape, but has even longer and more pointed wings (primary projection ≥ tertial length), which makes it look shorter-tailed. Told by saturated dark moss-green upperparts (at times tinged grey) with contrasting pale tertial edges, yellow-green edges to remiges and greater coverts, very long and prominent yellow supercilium, and well-marked grey-green eye-stripe from lores backwards. Throat, ear-coverts and upper breast pale lemon-yellow usually abruptly demarcated from silky-white rest of underparts. (Rarely lacks much yellow and green pigments, then looks brown and white; needs to be identified by voice, size, shape and distinct head markings.)