Son of Crocodile Hunter Steve Irwin follows in his footsteps

Robert Irwin looks a lot like his 'Crocodile Hunter' father Steve Irwin. Credit: The Tonight Show/PA

The 13-year-old son of "Crocodile Hunter" Steve Irwin showed he's a chip off the old block in an enthusiastic performance on The Tonight Show Starring Jimmy Fallon.

Robert Irwin introduced the host to a plethora of animals, including the "gorgeous" Valentino the two-toed baby sloth - one of his favourites.

Robert Irwin pictured with his father back in April 2004. Credit: AAP/PA Images

Dressed in Irwin-esque khaki shorts and Australia Zoo short sleeve shirt, the young animal expert reeled off facts including what the slowest mammal in the world likes to eat, and that sloths move so slowly algae can grow on their fur.

Robert explained his love of animals was "in my blood" and offered to help host Jimmy Fallon "overcome" his fears - introducing him to a dwarf crocodile, a red-tail boa, a screaming hairy armadillo and two sloths.

The schoolboy melted the hearts of a nation, with many likening him to his father ... including his older sister and fellow wildlife enthusiast Bindi Irwin:

Nature expert Irwin died in 2006, at just 44 year years, after being pierced in the chest by a stingray barb while filming an underwater documentary.