Scottish country dances include reels (including hornpipes), jigs, and strathspeys according to the type of music to which they are danced. The first two types (also called quick-time dances) feature fast tempos, quick movements and a lively feel. The third type (strathspey) has a much slower tempo and a more elegant style.
The tunes are played on the fiddle, accordion, flute, piano, drums, etc. (no bagpipes, mostly!). For an idea of the music we dance to, check out the Scottish Tunes page