Barred warbler – Sylvia nisoria
it is the largest Sylvia warbler, 15.5–17 cm in length and weighing 22–36 g, mainly grey above and whitish below. Adult males are dark grey above with white tips on the wing coverts and tail feathers, and heavily barred below. The female is similar but slightly paler and has only light barring. Young birds buffy grey-brown above, pale buff below, and have very little barring, with few obvious distinctive features; they can easily be confused with garden warblers, differing in the slight barring on the tail coverts and the pale fringes on the wing feathers, and their slightly larger size. The eye has a yellow iris in adults, dark in immatures; the bill is blackish with a paler base, and the legs stout, grey-brown.

The European population is estimated at around 460,000 pairs. It has declined in some areas, particularly at the western end of its breeding range in Denmark (where it is now extinct as a breeding bird) and Germany, due to habitat loss from agricultural intensification; conversely, some increase has occurred in Ukraine and southern Finland. Further east, numbers are currently stable. Population densities range between 1–20 pairs per 10 ha in Germany, up to 30 pairs per 10 ha recorded in Kazakhstan.

The call sounds like this
Recording by Lars Lachmann from Xeno-canto