The Dartford warbler was first described in 1776 by the Welsh naturalist, Thomas Pennant. ... It is a small warbler with a long thin tail and a thin pointed bill. The adult male has grey-brown upperparts and is dull reddish-brown below except for the centre of the belly which has a dirty white patch. It has light speckles on the throat and a red eye-ring. ... Its breeding range lies west of a line from southern England to the heel of Italy. [Wikipedia]