According to the RSPB, around 650 Cetti's warblers are thought to be resident in the UK, with the majority nesting along the south coasts of England and Wales.

BBC: Cetti's warbler

Cuckoos lay their eggs in the nests of other species including dunnocks, reed warblers and meadow pipits.

BBC: Manx birdwatchers asked to listen out for cuckoos

The habitat is already attracting birds such as sedge and reed warblers, cuckoo, snipe, woodcock and oystercatcher.

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Over the course of six years, they watched 472 nests in which warblers had laid their eggs.

ECONOMIST: How cowbirds run protection rackets

Christa Mateman, at the Netherlands Institute of Ecology, in Heteren, and Jan Komdeur, at the University of Groningen, and their colleagues, have discovered that young female Seychelles warblers sometimes help at their parents' nest for a year or two after they hatch.

ECONOMIST: Sexy sons, dutiful daughters | The

At the same time, they reduced the diameter of the entrances to some of the nest boxes, in order to deny admission to cowbirds (which are larger than warblers).

ECONOMIST: How cowbirds run protection rackets

Warblers whose nests were thus protected did well, raising an average of four chicks to maturity in the absence of a cowbird parasite.

ECONOMIST: How cowbirds run protection rackets