[order] Passeriformes | [family] Sylviidae | [latin] Acrocephalus scirpaceus | [UK] Reed-Warbler | [FR] Rousserolle effarvatte | [DE] Teichrohrsänger | [ES] Carricero Común | [IT] Cannaiola | [NL] Kleine Karekiet

Kleine Karekiet determination

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Medium-sized, compact, robust, and skulking but inquisitive warbler. Plumage varies from brown olive to grey in adult and to rufous-brown in juvenil. Shows few features at any age except for rufous rump, with supercilium and eye-ring less distinct than any other Acrocephalus. Sexes similar, no seasonal variation.

Breeds in middle latitudes of west Palearctic, mainly in lowlands with continental climate. Spreads into oceanic climatic zone in western France, England and Wales. Stands of reeds used for nesting may be quite small, often by margins of sluggish rivers, ponds, or shallow lakes, or in narrow lines along ditches. Broader reedbeds in fresh or brackish waters tend to be less favoured, especially if dense and exposed to waves.

Acrocephalus scirpaceus is a widespread summer visitor to much of Europe, which constitutes >50% of its global breeding range. Its European breeding population is very large (>2,700,000 pairs), and was stable between 1970-1990. The species remained stable overall during 1990-2000, with the majority of national trends stable or increasing—including sizeable populations in Romania and Sweden.

Chiefly insects and spiders, some small snails, occasionally some plant material. An opportunist, able to tame advantage of local, variable, and short-lived sources of abundant food supply. Feeds mostly at middle height in reeds and rushes and in centers of bushes, and occasionally on ground.

This species has a large range, with an estimated global extent of occurrence of 10,000,000 km2. It has a large global population, including an estimated 5,300,000-10,000,000 individuals in Europe (BirdLife International in prep.). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern. [conservation status from birdlife.org]

Breeds late May mid August in western and central Europe. Nest site is built in vegetation over water, especially reed, also in other tall vegetation and low shrubs over dry ground. Nest is a deep, cylindrical cup of grass and reed stems and leaves, plus plant down and spiders' webs, woven round plant stems, lined with finer material including hair. 3-5 eggs are laid, incubation 9-13 days, by both sexes in roughly equal proportions during day.

Common and widespread summer migrant of western Palearctic, from central and southern British Isles and southern Scandinavia east across central Russia, and south to Northwest Africa, Mediterranean region, Near East, southern Russia, and western China. Winters in tropical Africa. (Baker K 1997) A.s. scirpaceus: Summer visitor much of Europe (absent northern regions; more local in south), west, central and south European USSR, locally north-west Africa; winters tropical Africa. Migrant Libya, Chad, Mauritania. Vagrant Iceland, Faroe Is. (6), Canary Is., Madeira. A.s. fuscus: Local summer visitor Transcaucasus, Caspian shore, east Turkey, Cyprus, south-west Syria, Lebanon, Jordan, Israel, north-east Egypt; winters tropical Africa. Recorded in winter (sub-species uncertain) Turkey, Jordan, Egypt. Migrant (sub-species uncertain) Iraq, Kuwait, north Saudi Arabia. (Parmenter T Byers C 1991)