Acrocephalus

Acrocephalus is a genus of passerine birds belonging to the family Acrocephalidae. These birds are commonly known as reed warblers or marsh warblers. They are found in Europe, Asia, and Africa, and many species are migratory, traveling long distances between their breeding and wintering grounds.

The genus is characterized by its slender build, long, pointed bills, and generally brownish or greenish plumage. They are typically found in wetland habitats, such as reed beds, marshes, and riverbanks, where they forage for insects, spiders, and small invertebrates. Their songs are often complex and varied, with males frequently engaging in elaborate vocal displays.

Notable species within the genus include the Eurasian Reed Warbler (Acrocephalus scirpaceus), the Sedge Warbler (Acrocephalus schoenobaenus), and the Great Reed Warbler (Acrocephalus arundinaceus). Some species, like the Great Reed Warbler, are among the largest of the Old World warblers. Evolutionary studies suggest that Acrocephalus represents a basal group within the broader Sylvioidea superfamily. The taxonomy of the genus has been subject to revision, with some species formerly placed in Acrocephalus now assigned to other genera within Acrocephalidae.