Wood Warbler

      Phylloscopus sibilatrix

      Information

      With its conspicuous song and its mating flight in the treetops, the Wood Warbler enlivens our beech-rich deciduous woods into whose light green foliage its lively yellow-green plumage blends perfectly. The nest - an artistic domed cup - is built near the ground. It is important that the entrance is visible from a low branch. This branch is the lowest step of a row of branches that lead close to the nest like stairs and are always used in the same way when the birds fly to their nest.

      Voice

      Status (in CH)
      regular breeder and 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)
      5'000 - 7'500 (2013-2016)
      Migration behaviour
      long-distance migrant
      Diurnal/nocturnal migrant
      Nocturnal migrant
      Length (cm)
      12-13
      wing span (cm)
      20-24
      Weight (g)
      7-12
      Nest site
      ground
      Food
      insects
      Group
      Warblers and allies
      Habitat
      deciduous forest
      Distribution
      Distribution
      Distribution
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      The Institute’s commitments

      Settlement behaviour, predation and population fluctuations in the wood warbler