Species Profile
Cetti's Warbler
Cettia cetti
Cetti's Warbler
Quick Facts
Conservation
LCLeast ConcernAlso known as: Cetti's Bush Warbler
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Appearance
The Cetti's Warbler is a small, compact bird with a rounded head and short, broad wings. Its plumage is predominantly warm brown above and paler buff-grey below, with a distinctive long, rounded tail often held cocked.
Both sexes look alike, and the only methods of distinguishing between the sexes are by observing their behaviour and listening to their song. The bill is dark grey, with pale pink visible on the base of the lower mandible. Legs are a pinkish brown.
Juveniles resemble adults but may appear slightly more rufous. The bird lacks striking or distinctive markings, contributing to its secretive nature.
Identification & Characteristics
Colors
- Primary
- Brown
- Secondary
- Buff
- Beak
- Brown
- Legs
- Brown
Attributes
Understanding Attributes
Rated 0–100 based on research and observation. A score of 50 is average across all bird species. These attributes are relative and don't necessarily indicate superiority.
Habitat & Distribution
Cetti's Warblers inhabit dense, damp vegetation near water bodies, including reedbeds, willow scrub, and overgrown ditches. They are found across southern and central Europe and parts of North Africa and extend eastward into Central Asia.
In the UK, they have expanded their range northward since the 1970s, benefiting from milder winters. They are now established breeders in southern and eastern England, with some birds pushing further north and west.
UK spots where sightings have been regularly reported include Radipole Lake and Lodmoor in Dorset, Exminster Marshes in Devon, Marazion Marsh in Cornwall, and Strumpshaw Fen in Norfolk. The species is rarely found inland, and reports north of The Wash and Morecambe Bay are unusual.
Distribution
Where to See This Bird
Explore regional guides for locations where this bird has been recorded.
Wales
United Kingdom
England
Cambridgeshire
Rutland
Bedfordshire
Buckinghamshire
Berkshire
Cheshire
Cornwall
Derbyshire
Devon
Gloucestershire
Dorset
East Riding of Yorkshire
Essex
East Sussex
Hampshire
Hertfordshire
Isle of Wight
Kent
Merseyside
Lancashire
Leicestershire
Lincolnshire
London
Manchester
Norfolk
Northamptonshire
Nottinghamshire
Oxfordshire
South Yorkshire
West Midlands
Suffolk
Shropshire
Somerset
Surrey
Staffordshire
Stockton-on-Tees
Warwickshire
Wiltshire
West Yorkshire
Worcestershire
West Sussex
Diet
Cetti's Warblers are primarily insectivorous, feeding on various small invertebrates. The most commonly consumed prey include damselflies, aphids, moths and their larvae, earthworms, beetles, flies, and molluscs.
They forage actively in dense vegetation, picking insects and spiders from leaves and branches. During autumn and winter, when insect availability is lower, they may supplement their diet with small berries and seeds.
Behaviour
Cetti's Warblers are notoriously skulking birds. They prefer to remain hidden in dense undergrowth. They move through vegetation with quick, mouse-like movements and rarely fly in open spaces.
Despite their secretive nature, males become conspicuous during the breeding season, perching briefly in the open to deliver their loud, distinctive song.
Calls & Sounds
The Cetti's Warbler's song is unmistakable - a sudden, explosive burst of notes often described as "cetti-cetti-cetti" or "plink-plink-plink-plink". This loud, abrupt call seems disproportionate to the bird's size, often startling unsuspecting listeners.
Both males and females sing year-round, although males are more vocal, with increased frequency during breeding season.
Nesting & Breeding
Breeding season for Cetti's Warblers typically begins in April. Males establish territories and attract females with their loud, distinctive song. They are often polygynous, with a male potentially mating with multiple females.
The nest is a deep cup made of grass, leaves, and plant fibres, usually well-hidden in dense vegetation near the ground. Females lay 3-5 reddish-brown eggs, which are incubated for about 16-17 days.
Both parents feed the nestlings, which fledge after 14-16 days. Cetti's Warblers often raise two broods per season, with the male continuing to sing and potentially attracting new mates while the first brood is being raised.
Conservation
While currently listed as Least Concern, Cetti's Warblers face threats from habitat loss and degradation, particularly the draining of wetlands.
Climate change is influencing their distribution, with populations expanding northward in Europe. Conservation efforts focus on protecting and managing suitable wetland habitats.
Elevation
Up to 1,450 meters
Additional Details
- Predators:
- Cetti's Warblers are preyed upon by various small mammals such as weasels and stoats, as well as birds of prey including sparrowhawks and kestrels.
Birdwatching Tips
- Listen for the distinctive, explosive song, especially in the early morning or evening
- Look for movement in dense vegetation near water bodies
- Be patient and still; the bird may eventually show itself briefly
- In the UK, focus on wetland reserves and reed beds
Did You Know?
- Cetti's Warblers are named after the 18th-century Italian zoologist Francesco Cetti.
- They are among the few European passerines with ten tail feathers instead of the usual 12.
- Despite their small size, they can survive temperatures as low as -15°C (5°F).
- Cetti’s is pronounced ‘chettys’ to rhyme with jetties
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