Savi's Warbler

A skulking reed-bed specialist, far easier to hear than see: the male's song is a long, mechanical reeling trill, often delivered from low in dense reed or sedge and easiest to pick out at dusk or before dawn. Listen from boardwalks or paths at the edges of European fens and marshes in late spring and early summer, when territorial males sing most persistently. Patience pays off more than movement, since it rarely perches in the open.