|Show||The Wild Thornberrys|
|First Appearance||"Pilot" September 1, 1998|
Donald Michael "Donnie" Thornberry is a feral boy who (as revealed in the 2001 4-part TV movie, The Origin of Donnie) was raised by orangutans after his biological parents, a pair of naturalists, were killed by poachers. Before the Thornberrys adopted him, the special also reveals that Nigel and Marianne knew his parents Michael and Lisa. He commonly wears a pair of leopard-spotted shorts and he loves to eat all types of bugs. He babbles wildly and makes animal-sounds (but nothing Eliza can understand), occasionally spouting blurbs of English or showing random signs of sophisticated education. Donnie is four years old for most of the series, but turns five in The Origin of Donnie. It was shown that while his parents were teaching orangutans sign language, he learned as well. Though only one sign was shown (family), it is unknown how much he actually knows.
Nicktoons: Attack of the ToybotsEdit
Donnie appears as a collectible Master Model in the console version of Nicktoons: Attack of the Toybots.