Bindi Irwin Thanks Steve Irwin For Being 'Amazing Guardian Angel' For Daughter Grace

Bindi Irwin paid tribute to her dad Steve Irwin on Sunday, which marked both Australia's Father's Day and the 16th anniversary of his death. The conservationist shared a throwback photo of one of her and late father's wildlife adventures. She captioned it, "Grandpa Crocodile, I know you would’ve been the most incredible grandfather because you were such an extraordinary dad. Thank you for being an amazing guardian angel for Grace."