Bindi Irwin welcomes daughter on first wedding anniversary

"Her middle names, Warrior Irwin, are a tribute to my dad and his legacy as the most incredible Wildlife Warrior," the 22-year-old wrote.

In January, Bindi and Powell recreated a moment that Bindi had with the late Steve Irwin and her mother, Terri, as a girl awaiting the birth of her younger brother, Robert: 

Steve Irwin was an Australian zookeeper who rose to international fame through his and Terri's The Crocodile Hunter wildlife documentary series that began in 1996 and continued until his death. The 44-year-old died on Sept. 4, 2006, when a stingray stabbed him with its tail. The attack pierced Irwin's heart. The lone witness shared his story in March 2014:

Bindi and Robert have carried on her Steve's legacy as wildlife conservationists at the Australia Zoo.