It's the percussion section, and it doesn't carry a tune, but the bodhran properly learned is quite fast to pick up, and expands your musical horizons into that area. As an easy and inexpensive instrument -- if you fancy yourself with watercolors and brush you can easily fancy the skin right up -- it's a good one for the band musicians to double on.
The Corries made great effect with one regular bodhran and one extra-large one, particularly on "I Will Go." Have to find yourself a suitably huge goatskin, though. Multiple bodhrans in action tend to develop hypnotic complexities of rhythm. Bodhrans also jibe well with doumbeks.