Last updated at 10:54

Bird poo turned into music by artist Kerry Morrison

Bird droppings on music sheet
Bird droppings on music sheet

Talk about hitting a bum note - an artist has used bird droppings to create a piece of music!

Kerry Morrison put out blank music sheets in Liverpool parks and waited for birds to poo on them.

Music sheet on the street
Music sheet on the street

Composer Jon Hering then used the markings on the scales to create a 20-minute musical score.

The result, called Bird Sheet Music, is being performed by an orchestra at the Tate Liverpool on Sunday.

Morrison said the music represented the role birds play in the environment.