Willow Warbler

Willow Warbler (Phylloscopus trochilus )

The Willow Warbler (Phylloscopus trochilus ) is a passerine bird in the genus of warblers (Phylloscopus ) and the family of the warbler -like ( Sylviidae ). We distinguish several subspecies. The nominate Phylloscopus trochilus trochilus is a common and very common breeding and summer bird in Central Europe.

Description

The Willow Warbler is about eleven to thirteen inches long and has a wingspan of 17-22 centimeters. The weight is about eight to eleven grams. He is to be distinguished in appearance from the difficult Chiffchaff (Phylloscopus collybita ). The vocals however, makes it possible to identify both species clearly. The top is green to olive brown, dyed his underside yellowish white. The little bird has a yellowish throat, chest and eyes glancing over. Males and females have the same coloring.

A Willow Warbler can be up to twelve years old.

Habitat

In almost all of Central and Northern Europe, the long-distance migrant from April to September is present. He has in sub-Saharan Africa His winter quarters. This laid back a railway line 6000-13000 kilometers. Check-out time and the pulling direction are innate. The Willow Warbler lives in light deciduous and mixed forests, parks, wetlands, bush landscapes and gardens.

Nutrition

The Willow Warbler feeds on spiders, molluscs, berries, fruits, insects and their larvae.

Voice

The song of the Willow Warbler is reminiscent of that of the chaffinch, but is much softer and gesäuselter.

Reproduction

Sexual maturity occurs after one year. The main breeding season is May to July. Built of moss and grass nest of soil breeder that has a canopy with a side entrance, is well hidden in thick bushes or grass. The female lays four to seven eggs. The eggs are warmed 12 to 14 days. The young birds stay 13 to 14 days in the nest. In southern areas, there is frequently a second brood.

Stock

The European population is estimated at about 40 million breeding pairs, the stock in Germany to 1.8 to 2.4 million couples. The species is thus in 2008 in the list of common breeding birds in 14th place. Depending on climatic conditions and habitat changes occur locally and regionally significant short-term stock fluctuations, which can be up to fifty percent. Due to the high reproductive rate of this type, the population is built up very quickly again normally.

Since the 19th century it has partially given area expansion in Northern Europe. These are both due to climate change as due to a change in forest management or habitat favorable developments. Thus, the willow warbler has, for example, located on the Frisian Islands, after there woody plant have been made.

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