Reed Warbler (Cettia cetti)

Cetti’s Warbler is an insectivorous bird species belonging to the family Cettiidae, inhabiting dense thickets and reedbeds.

It has a stocky build, short wings, and a broad, rounded tail that is typically held raised or half-open. The crown, back, wings, and upper tail are reddish-brown, while the underparts are dirty white. The wing edges and breast are pale yellowish, with a distinct grayish-white eyebrow stripe. Unlike many other birds, its tail consists of 10 feathers rather than 12. The legs and bill are yellow or pinkish-yellow. Females and males are visually indistinguishable, but males are recognized by their high-pitched songs. The species is named after the Italian zoologist Francesco Cetti.

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Dense reedbeds, marshes, and riparian thickets are the primary habitats of Cetti’s Warbler. Slow-moving rivers, lake shores, and swamp edges are especially favored for breeding and shelter. The nest is built among reeds and rushes, sometimes deep within dense vegetation. It can be found throughout Türkiye in suitable habitats. In the Marmara, Aegean, Mediterranean, Southeastern Anatolia, western Central Anatolia, and Black Sea coastal regions, it is resident year-round. In other areas, it occurs as a summer migrant. Globally, it breeds across southern Europe, northwestern Africa, and parts of Asia as far east as Afghanistan.

It is an insectivorous species, feeding on various insects, larvae, and small invertebrates. Breeding begins in mid-June. The nest is cup-shaped, constructed from roots, stems, and plant material, and lined with feathers, hairs, and marsh vegetation. The eggs are glossy chestnut-brown with dark spots. Only the female incubates the eggs. The chicks leave the nest after approximately 15 days.

Cetti’s Warblers may be migratory or resident depending on their geographic location. Populations in western and Mediterranean regions are generally resident, while individuals in southwestern Asia descend to lower elevations during winter. Eastern populations are largely migratory. It is estimated that between 1.2 and 3.3 million individuals exist in Europe.

This is a secretive and elusive species. It moves swiftly and skillfully through dense thickets. The male’s powerful song is the most distinctive feature of the species and is often the only way observers detect its presence. Females do not sing, making them difficult to distinguish during observation.

Cetti’s Warbler (Cettia cetti) is listed as “Least Concern” (LC) on the International Union for Conservation of Nature (IUCN) Red List. This classification is based on the species’ wide distribution, large population size, and generally stable or increasing population trend. Although habitat loss and changes in wetland ecosystems pose local threats, the species faces no significant risk of extinction in the near future at a global scale.