What is "dartford warbler"

Furzeling \Furze"ling\, n. (Zo["o]l.) An English warbler ( Melizophilus provincialis); -- called also furze wren, and Dartford warbler.

The Dartford warbler (Sylvia undata) is a typical warbler from the warmer parts of western Europe and northwestern Africa. Its breeding range lies west of a line from southern England to the heel of Italy (southern Apulia). The Dartford warbler is usually resident all year in its breeding range, but there is some limited migration.