Heavy Horses is an album released by Jethro Tull on April 10, 1978. It is considered the second album in a trilogy of folk-rock albums by Jethro Tull although folk music's influence is obvious on virtually every Tull release. The album abandons much of the folk lyrical content typical of the previous studio album, Songs from the Wood, in exchange for a more realist perspective on the changing world. Likewise, the band sound is harder and tighter.