Aquatic Warbler

The Aquatic Warbler is a vulnerable migratory reed warbler weighing about 13 grams with a wingspan near 12 cm, breeding in sedge fens of central and eastern Europe. It is the only globally threatened migratory passerine in continental Europe, with a distinctive streaked buff and brown plumage and prominent pale supercilium. Drainage of its specialized wetland breeding habitat has caused sharp population declines.