Sparrow-sized but slim and with a long, deeply notched tail, the male has a black head, white collar and a drooping moustache. Females and winter males have a streaked head. In flight the tail looks black with broad, white edges.
A small olive-brown warbler which actively flits through trees and shrubs, with a distinctive tail-wagging movement. Less bright than the similar willow warbler and readily distinguished by its song, from where it gets its name. Picks insects from trees and also flies out to snap them up in flight.
The male has the most elaborate and ornate plumage with distinctive long orange feathers on the side of the face, orange 'sails' on the back, and pale orange flanks. The female is dull by comparison with a grey head and white stripe behind the eye, brown back and mottled flanks. They were introduced to the UK from China and have become established following escapes from captivity. And now...........it's them!!!!!!!!!!!