- Curruca undata
12·5 cm (5 in)
- Rufous below
- Grey back
- Grey head
- Red throat with white spots
- Red iris
- Long tail
- Paler underparts
- More of a brown grey below
Breeds in southern England, the Channel Islands and southernmost Wales, in western France and on the Mediterranean coast and throughout Iberia. Also breeds on Menorca, on Corsica and Sardinia, southern Italy and north-east Sicily and in coastal North Africa in Morocco, Algeria, and Tunisia.
Britain lies on the northern edge of this species' range and it occurs mainly in southern England with the bulk of the population found from Devon to Sussex and Surrey with small numbers in Cornwall and on the Isle of Wight. With global warming, the species has increased and spread north in recent decades, and now breeds in coastal heaths in south Wales, Essex, Suffolk and Norfolk; extralimital breeding has also occurred in north Wales and Staffordshire.
- C. u. dartfordiensis: has a dark brown mantle
- C. u. undata: has a slate-grey mantle
- C. u. toni: the palest race, is greyish-brown above and paler and duller below
In north of range found on open heathland with abundant gorse (Ulex sp.) and heather (Calluna vulgaris) to provide cover, further south in dense thorny scrub and maquis, sometimes in open pinewoods. In Spain it is mainly present in areas with low scrub (no taller than 1 metre) without trees (or with only few). Slopes with Gum Cistus (Cistus ladanifer) are a favourite.
The diet consists mostly of insects and spiders, with the addition of berries outside of the breeding season.
It nests in low vegetation. The clutch consists of 3-6 eggs.
Song: a scratchy rattling warble. Call has been described as a sort of lowish buzz "ddzzz".
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
- Bird Atlas 2007-11. BTO.
- Handbook of the Birds of the World Alive (retrieved February 2016)
- BirdForum Opus contributors. (2023) Dartford Warbler. In: BirdForum, the forum for wild birds and birding. Retrieved 1 December 2023 from https://www.birdforum.net/opus/Dartford_Warbler
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