Curruca Warblers

Sylvia is a genus of small birds in the "Old World warbler" family Sylviidae.

There are seven species in the genus. Typical warblers occur in the temperate to tropical regions of Europe, western and central Asia, and Africa.

They are strongly built, with stouter legs and a slightly thicker bill than many other warblers. The plumage is in varying shades of grey and brown, usually darker above and paler below, with bluish or pinkish tones in several species; several also have orange-brown or rufous fringed wing feathers. The tail is square-ended in most, slightly rounded in a few, and in several species has white sides. Many of the species show some sexual dimorphism, with distinctive male and female plumages, with the males in many having black or bright grey on the heads, replaced by brown, brownish-grey or similar dusky colours in females; about a third of the species also have a conspicuous red eye ring in males. Species breeding in cool temperate regions are strongly migratory, whil...

Source: Wikipedia