Pigs on the Wing (Part I)

Whose song is Pigs on the Wing (Part I)?

Artist Album
Pink Floyd
4 Live in Ohio
7/6/77 Montreal show disc 1
Animals
Dortmunds
Dortmunds (Disc 01)
Plays the Animals (1977-05-09) (CD 1)
Roger Waters
Pros And Cons At The Spectrum (24 July 1984)
The Happiest Night Of Our Lives [Santiago 2002-03-05] - cd1
The Machine
'Til We Meet Again CD1