Robert Irwin marks 16th birthday by feeding and wrangling crocodiles at ...

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Robert Irwin celebrated his 16th birthday at Australia Zoo on Sunday.

The son of late Crocodile Hunter Steve Irwin welcomed a throng of fans to the Sunshine Coast park as he marked the special milestone with mother Terri, 55.

Feeding and wrangling crocodiles, the Australian teenage wildlife warrior hosted a wilder-than-usual childrens' party.

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Happy birthday! Robert Irwin (left) marked his 16th birthday by feeding and wrangling crocodiles and cutting into a rhino cake during wild celebrations at Australia Zoo on Sunday (Pictured with mother Terri Irwin)

Happy birthday! Robert Irwin (left) marked his 16th birthday by feeding and wrangling crocodiles and cutting into a rhino cake during wild celebrations at Australia Zoo on Sunday (Pictured with mother Terri Irwin)

In a video posted to his Instagram, Robert shared his excitement for the big day and invited his fans to join in the celebrations at Australia Zoo.

He said: 'G'day everyone. Today is my 16th birthday and I'm really excited to celebrate with you all. Thank you so much for all of your birthday wishes coming through.' 

'I hope to see you all there. We'll be feeding crocodiles live in the Crocoseum and there will be free birthday cake for everyone.' 

Loss: Robert (left) was just two years old when his father died at age 44. Pictured: Late Steve Irwin and now-widow Terri with their children on June 19, 2006 (Pictured in 2004)

Loss: Robert (left) was just two years old when his father died at age 44. Pictured: Late Steve Irwin and now-widow Terri with their children on June 19, 2006 (Pictured in 2004)

Just like his dad! Robert fed crocodiles in the Crocoseum, just like his late father Steve would

PICTURED: Late Crocodile Hunter Steve Irwin holding Robert's sister Bindi, then three, in 2002

Just like his dad! Robert fed crocodiles in the Crocoseum, just like his late father Steve would

Helping hand: Robert's mother Terri stayed close to Robert as he fed one of the zoo's largest crocodiles in front of a growing crowd

Helping hand: Robert's mother Terri stayed close to Robert as he fed one of the zoo's largest crocodiles in front of a growing crowd

Showing off his skills! The birthday boy - clad in khaki - also wrangled crocodiles on the day

Showing off his skills! The birthday boy - clad in khaki - also wrangled crocodiles on the day

Impressive! Robert was overjoyed when a large rhinoceros cake was wheeled into the Crocoseum with candles marking '16'

Impressive! Robert was overjoyed when a large rhinoceros cake was wheeled into the Crocoseum with candles marking '16'

Robert was overjoyed when a large rhinoceros cake was wheeled into the Crocoseum with candles marking '16'.

Fans cheered and sung happy birthday to the wildlife warrior as his proud mother

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