Sire: Grindstone

Grandsire: Unbridled

Dam: Dear Birdie

Damsire: Storm Bird

Sex: Stallion

Foaled: 2001

Country: United States

Colour: Bay

Breeder: Marylou Whitney

Owner: Marylou Whitney and John Hendrickson

Trainer: Nick Zito

Jockey: Edgar Prado

Record: 9 Starts: 5 - 0 - 0

Earnings: $1,575,600

Major races: Belmont Stakes, Travers Stakes, Jim Dandy Stakes

Post Career: Retired from racing in 2005. Stood at stud at Gainesway Farm in Lexington, Kentucky. He has sired numerous stakes winners and has become a successful breeding stallion. Some of his notable offspring include Summer Bird, Mine That Bird, and Noble Bird.  Birdstone continued to stand at stud at Gainesway Farm until his death in 2020.