Birds of Switzerland
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    Willow Warbler

    Phylloscopus trochilus

    Information

    The Willow Warbler and the Common Chiffchaff are so-called sibling species and look very similar. They are best distinguished by their song: The Willow Warbler's song sounds mournfully fluting. The pronounced migrant spends the winter south of the Sahara. Our country lies at the southern limit of its range. The Willow Warbler's main areas of distribution are northern wooded and bushy areas where it is one of the most widespread and abundant bird species. In April and May you can guess its frequency when passage migrants advertise their presence by singing in every garden, every cluster of trees and every wood.

    Voice

    Status (in CH)
    regular, scarce breeder, common migrant
    Annual cycle
    The bar on the top line indicates during which seasons the species can be observed regularly in Switzerland. There can be great seasonal fluctuations of numbers. The middle bar indicates the typical migration seasons of a species. The bottom bar indicates the period during which the species normally breeds. As a rule it spans the period from egg-laying to fledging of the young.
    Annual cycle
    Annual cycle

    Facts

    Population size in Switzerland (Pairs)
    2'000 - 6'000 (2008-2012)
    Migration behaviour
    long-distance migrant
    Diurnal/nocturnal migrant
    Nocturnal migrant
    Length (cm)
    11-12
    wing span (cm)
    17-22
    Weight (g)
    8-10
    Nest site
    herbaceous layer
    Food
    insects
    Group
    Warblers and allies
    Habitat
    wetlands, bush
    Distribution
    Distribution
    Distribution