Species Profile
Dartford Warbler
Curruca undata
Quick Facts
Conservation
NTNear ThreatenedLifespan
3–5 years
Length
12–13 cm
Weight
9–12 g
Wingspan
15–18 cm
Migration
Resident
Also known as: Provençal Warbler
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Appearance
The Dartford Warbler is a small, long-tailed warbler with distinctive dark grey upperparts and wine-red underparts. It has a slender build, with a relatively long tail often held cocked. The bird's red eye ring contrasts sharply with its dark plumage.
Males are more brightly coloured than females, with deeper red underparts and darker grey backs. Juveniles resemble females but have duller plumage overall, lacking the adult's red eye ring.
Identification & Characteristics
Male Colors
- Primary
- Grey
- Secondary
- Red
- Beak
- Black
- Legs
- Brown
Female Colors
- Primary
- Grey
- Secondary
- Red
- Beak
- Black
- Legs
- Brown
Male Markings
Reddish-brown underparts, grey blueish upperparts, reddish eye-ring
Tail: Long and dark
Female Markings
Duller plumage with less red on the underparts
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
Dartford Warblers inhabit lowland heaths, coastal gorse, and scrubland areas across western Europe and northwest Africa. They prefer areas with a mix of gorse, heather, and scattered trees.
They are mainly found in the UK in southern England, with strongholds in counties like Dorset, Hampshire, and Surrey. Their sensitivity to cold winters limits their distribution, restricting their northern range.
Distribution
Where to See This Bird
Explore regional guides for locations where this bird has been recorded.
Diet
Dartford Warblers primarily feed on small insects and spiders found in heathland vegetation. They forage actively among gorse and heather, gleaning prey from leaves and branches. During autumn and winter, they may supplement their diet with small berries.
Behaviour
Dartford Warblers are active and restless birds, often seen flitting rapidly through dense vegetation. They have a characteristic habit of cocking their long tails while perched.
These birds are typically secretive but may become more visible during the breeding season when males perform song flights.
Calls & Sounds
The Dartford Warbler's song is a distinctive, scratchy warble, often described as a rapid 'churr-churr-churr'. Their call is a sharp, metallic 'chat' or 'tack'. Males frequently sing during the breeding season, often from exposed perches or during short flight displays.
Nesting & Breeding
Breeding occurs from April to July, with pairs often producing two broods per season. Males perform display flights and sing from prominent perches to attract mates.
Nests are well-concealed, cup-shaped structures built low in dense gorse or heather. Females typically lay 3-4 eggs, which are white or pale green with brown speckles.
Both parents incubate the eggs for about 12-14 days. Chicks fledge after 10-14 days but remain dependent on their parents for several more weeks.
Conservation
The Dartford Warbler is classified as Near Threatened due to its vulnerability to harsh winters and habitat loss.
Conservation efforts focus on maintaining and restoring heathland habitats, particularly in southern England where the species has its northernmost breeding range.
Population
Estimated: 1,400,000 - 3,400,000 mature individuals[3]
Trend: Decreasing[2]
Population decreasing, vulnerable to severe winters
Elevation
Sea level to 2,000 meters
Additional Details
- Egg size:
- Approximately 1.5cm x 2cm
- Predators:
- Main predators include domestic cats, Eurasian Sparrowhawks, and Eurasian Jays.
- Alarm calls:
- A harsh, rasping 'churr'
- Breeding age:
- 1
- Maturity age:
- 1
- Feeding times:
- Throughout the day
- Major threats:
- Habitat loss due to urban development and changes in farming practices
- Parental care:
- Both parents incubate eggs and feed chicks - female takes largest share of incubating
- Primary calls:
- A rapid, scratchy warble
- Social habits:
- Territorial and often seen in pairs
- Egg appearance:
- White, or sometimes pale green with small brown spots
- Feeding habits:
- Feeds on insects in gorse and heather
- Breeding season:
- Mid March to August
- Diet variations:
- May eat berries in winter
- Fledging period:
- Approximately 2 weeks
- Average lifespan:
- 2
- Call description:
- A mixture of churrs, whistles and trills
- Daily activities:
- Active during the day, especially at dawn and dusk
- Nesting location:
- Low in gorse or heather
- Number of broods:
- Up to three, but mainly two
- Incubation period:
- Around 12 days
- Nest construction:
- Dome of grass and moss, lined with feathers
- Migration patterns:
- Non-migrant with short movements
- Migratory patterns:
- Non-migrant, remains in territory all year
- Age related changes:
- None known
- Prey capture method:
- Active hunting, often hovering to pick insects from plants
- Conservation efforts:
- Habitat protection and management schemes in place
- Territorial behavior:
- Defends territory with song and display flights
- Reproductive behavior:
- Monogamous, with pair bonds lasting a year
- Special dietary needs:
- None known
- Clutch characteristics:
- 3-6 eggs, mainly 4-5
- Interaction with other species:
- Generally solitary, but may form loose flocks in winter
Birdwatching Tips
- Look for movement in low, dense vegetation in heathland areas
- Listen for their distinctive scratchy song, especially in spring
- Be patient, as they often stay hidden in gorse or heather
- Visit known breeding sites in southern England for the best chances of spotting them
- Use binoculars to spot their red eye-ring, a key identifying feature
Did You Know?
- Dartford Warblers are one of the few warbler species that do not migrate from the UK in winter.
- They were first discovered in England near Dartford, Kent, hence their common name.
- These birds can survive on dew collected from vegetation when water is scarce.
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