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Garden Warbler

Garden Warbler Garden Warbler Both Sexes
Plain olive grey-brown.
Distribution map - when and where you are most likely to see the species.
Sylvia borin
Length: 14 cm  (4½")
Wing Span: 20-22 cm  (8-9")
Weight: 16-23 g  (½-¾ oz)  
Breeding Pairs: 200 000
Present: Summer
Status: Green

Description

The Garden Warbler is a stocky bird with thick grey bill and grey legs. The plumage is plain looking and olive brown-grey in colour, paler underneath than above. There is just the faintest hint of a supercilium, but no eye stripe.

Juveniles are very similar to adults but sometimes more olive than grey.

This warbler skulks in shrubs and undergrowth and so you may not even be aware of its presence without hearing its song first.

The Garden Warbler can be confused with Common Whitethroats and Lesser Whitethroats, but both of these have white throats, and with the Blackcap, which has a black cap.

Voice

Choose from Quicktime and mp3. Song Alarm Call
  Quicktime mp3 Quicktime mp3

Their song is quite beautiful and is confusingly similar to the Blackcap, but is often longer (lasting anything up to 10 seconds or more), mellower, less varied and rather tiresome. They usually sing from a well concealed perch, which adds to the frustration of identifying the bird.

The alarm call is a repetitive "tacc tacc".

Feeding

Like the Blackcap they have a diet of invertebrates, such as caterpillars, larvae, spiders, flies and worms. In the autumn, it feeds on berries and fruit.

Nesting

They breed in woods and large gardens with tall trees and shrubby undergrowth or hedgerows. The nest is built by both birds and is usually low in a tree or bush. The cup-shaped nest is made from dry grasses and lined with finer grasses and hair.

The eggs are white or buff with purplish-brown or grey spots, smooth and glossy, and about 20 mm by 15 mm. Both birds share the duty of incubating the eggs and feeding the young.

Breeding Data
Breeding Starts Number of Clutches Number of Eggs Incubation (days) Fledge (days)
Late May 1-2 3-7 10-12 9-12

Movements

They are a summer visitor to Britain (April to September), and winter in in the scrubby savannah of Africa (south of the Sahara).

Conservation

Garden Warbler numbers have fluctuated in the same way as other warblers, such as Whitethroat, whose migration takes them across the Sahara and is probably a result of changes in the weather in Africa.

My Garden

Garden Warblers have not visited our garden, and rarely visit any gardens except large, mature ones. There are usually quite a few birds in the local woods.

Like most of our warblers, the Garden Warbler is a summer visitor, choosing to breed here in the summer and migrate to tropical Africa for the winter.


Last revision: 21 Feb 2015
Copyright © David Gains 1999-2017.
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