A composition of Fermanagh flute player James McMahon, who wrote the Banshee. I first learned the A major version from Charlie Piggott and Gerry Harrington’s duet playing, but transposed it back to the original key. A different version of the tune can be found on page 82 of Hidden Fermanagh Book. It seems to be included in Ceol Rince Vol 4, too.
There are a couple of jigs with similar pentatonic feel: