Blackbird’s Rachel Clark and Bob DeMarco perform traditional music of Celtic origin, as well as tunes of their own creation. The duo is fast becoming a necessary item to an admiring audience the length and breadth of Vermont and farther afield in New England. Whether concerts, special events, farmers’ markets or St. Patrick’s eve “Fiddle Frenzy,” their Irish flute, fiddle, whistles, accordion, cittern, piano, guitar, and voices combine to serve up a lively musical mix that is stirred by memories of Rachel’s early childhood in Sweden and Bob’s inspiration and love for Celtic music from his Ireland born, Gaelic singing mother.