Brown Bird, a duo hailing from Providence, Rhode Island, has been generating some acclaim over the past year. With a sound best described as post-Nick Cave folk, they’ve got some catchy songs that nevertheless brook a feeling of impending doom. Their set from last year’s Newport Folk Festival was featured by NPR, and they keep snagging the opening slot on some wonderful tours. Brown Bird came through last November with the Devil Makes Three, and tonight they warm up the audience at Liberty Hall before Yonder Mountain String Band takes the stage. Check out a live version of “Nothing Left,” off last year’s Salt for Salt, above.