"Dragonfly" is a song written by British rock musician Danny Kirwan with lyrics taken from a poem by Welsh poet W. H. Davies. It was originally recorded by Kirwan's band Fleetwood Mac in 1970, and became the first UK single released by the band after the departure of their frontman Peter Green. It was also their first single with Christine McVie as a full member of the group. By the time the song had been released, guitarist Jeremy Spencer had left the band.

The lyrics to "Dragonfly" were taken from W. H. Davies' 1927 poem, "The Dragonfly", with some lines switched around and others omitted. The poem included an extra verse that does not feature in the song. Kirwan wrote the music for the song, sang and played guitar, accompanied by Mick Fleetwood on drums and John McVie on bass guitar.

The B-side of the single, "The Purple Dancer", was written by Kirwan, Fleetwood and John McVie, and featured vocals from both Kirwan and Jeremy Spencer. Both songs were recorded during the same session in late 1970. Spencer did not participate in the recording of "Dragonfly", but both songs were played at concerts during late 1970 and early 1971 and exist on bootleg recordings. "Dragonfly" was also recorded for the German TV show Beat-Club in 1971, after Spencer had left the band. New guitarist Bob Welch featured in the performance in Spencer's place.

"Dragonfly" was recorded after the release of Fleetwood Mac's Kiln House album in September 1970, and no songs from that album had been released as singles in the UK, although "Jewel Eyed Judy" was a single in the United States, Germany and the Netherlands, and "Tell Me All the Things You Do" had been released in France. "Dragonfly" was chosen as the band's next single in the UK, Germany and the Netherlands. Special picture sleeves were issued for the German and Dutch releases, but the British single had a plain Reprise sleeve.

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