Savage Garden is an average looking carrier pigeon. Around its left ankle, it carries a chain with the Speedwagon Foundation logo imprinted on it; this serves as its method of carrying items, such as the Stand DISC.
As a carrier pigeon, Savage Garden has been trained to be able to fly to a specific location on behalf of the Speedwagon Foundation and retrieve items to be brought back to them.
Savage Garden is mentioned by an agent of the Speedwagon Foundation as the person Jolyne needs to look for when she gets to the prison's courtyard in order to send the Foundation her father's Stand DISC.
When Jolyne eventually makes it to the courtyard after a battle with one of Enrico Pucci's agents, she is surprised to discover that Savage Garden is not a person like she assumed, but a carrier pigeon. She attaches the DISC to the holder chained around its ankle, and it flies off with it. Pucci's Stand Whitesnake attempts to use the gun of a prison guard to shoot Savage Garden down, but the guard had already used all of the bullets loaded in it, thus allowing Savage Garden to safely carry the DISC back to Jotaro Kujo's doctors at the Speedwagon Foundation.