Garden Warbler
Least ConcernSylvia borin
Visual Identification
Garden Warbler
Appearance
The Garden Warbler is a small, plain songbird with an overall dull brown-grey plumage. It has a slightly paler underside and a faint pale eye-ring, which can be difficult to see in the field. The bird lacks any distinctive markings or patterns.
Males and females are virtually identical in appearance. Juveniles closely resemble adults but may have a slightly warmer brown tone to their plumage. There are no significant seasonal plumage changes in this species.
Size
Length
14cm to 15cm
Wingspan
22cm to 24cm
Weight
16g to 22g
Colours
Males and females have similar plumage
Primary Colour
Brown Grey
Secondary Colour
Buff White
Beak Colour
Grey
Leg Colour
Grey
Habitat and Distribution
Habitats
Woodland
Garden
Wetland
Coastal
Urban
Farmland
Grassland
Desert
Tundra
Rainforest
Mountain
Savanna
Distribution
Garden Warblers breed across much of Europe and western Asia, favouring deciduous woodlands, forest edges, and dense scrubland. They also inhabit parks and mature gardens with sufficient cover. They are widespread but patchily distributed in the UK, being more common in southern and eastern regions.
During winter, these birds migrate to sub-Saharan Africa, occupying a range of wooded and scrub habitats. Their distribution spans from Senegal east to Ethiopia and south to South Africa, showcasing their remarkable long-distance migration capabilities.
Elevation Range
Up to 2,300 meters
Climate zones
Temperate, Subtropical
Distribution Map
Distribution by Region
Behaviour and Ecology
Bird Attributes
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Diet
Garden Warblers are primarily insectivorous during the breeding season, feeding on various insects and their larvae. Aphids, flies, beetles, and caterpillars are all key prey items.
Later in the year, they supplement their diet with berries and small fruits, especially during autumn migration. These birds gorge on elderberries and other soft fruits to build up fat reserves for their long migratory journeys.
Behaviour
Garden Warblers are known for their skulking behaviour, often staying hidden within dense vegetation. They forage actively among leaves and branches, gleaning insects with quick, precise movements.
During the breeding season, males become more visible as they sing from exposed perches to defend territories and attract mates.
Vocalisation
What they lack in distinctive visual appearance, Garden Warblers more than compensate in musical ability.
The song is a rich, melodious warble lasting up to 5 seconds. It consists of a series of sweet, fluty notes that rise and fall in pitch, often described as 'bubbling' or 'liquid'.
Their call is a soft, low 'tack' or 'chek'. During migration, they may give a quiet, scratchy subsong. Some mimicry also occurs.
Nesting & Breeding
Garden Warblers form monogamous pairs each breeding season, typically from May to July in Europe. Males establish territories and attract females with their rich, melodic songs.
The female builds a cup-shaped nest low in dense vegetation, often in brambles or nettles. The nest is constructed of grass stems and leaves lined with finer materials. A clutch of 4-5 eggs is laid, which are creamy-white with brown speckles.
Both parents incubate the eggs for about 11-12 days. The chicks are altricial and fledge after 9-12 days, but the parents continue to feed them for another two weeks. Some pairs may attempt a second brood if conditions are favourable.
Lifespan
years
The Garden Warbler typically lives for 5 to 8 years.
Like all birds, lifespan can be affected by factors including predation, habitat quality, disease, and access to food sources.
Conservation and Status
Global Conservation Status
While the Garden Warbler is currently listed as Least Concern, it faces threats from habitat loss in both breeding and wintering grounds. Climate change may also affect its migration patterns and breeding success.
Conservation efforts focus on preserving diverse woodland habitats and reducing the use of pesticides in agricultural areas.
Birdwatching Tips
- Listen for their melodious, flute-like song in woodland edges and gardens
- Look for movement in dense foliage, especially in the lower to middle levels of vegetation
- Observe feeding behaviour on fruit trees during late summer and early autumn
- In the UK, watch for them in hedgerows and scrubland from April to September
Additional Information
Quick Facts
Other names:
European Garden Warbler
Family:
SylviidaePredators
Garden Warblers are preyed upon by various birds of prey, including Sparrowhawks and Hobbies. Ground predators such as cats, stoats, and weasels may also target nests and fledglings.
Did You Know?
- Garden Warblers can increase their body weight by up to 65% before migration.
- Despite their name, they are more commonly found in woodlands than gardens.
- They are one of the latest spring migrants to arrive in Europe, often not appearing until May.
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References
- 1 2
website: BirdLife International. 2017. Sylvia borin (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T22716906A111812037.
View source - 3
report, 2015: EBCC