By what "animal" nickname is fictional hunter-poacher Michael J. Dundee known?

Michael J. "Crocodile" Dundee (also called Mick), played by Paul Hogan, is a fictional protagonist in the Crocodile Dundee film series consisting of Crocodile Dundee, Crocodile Dundee II, and Crocodile Dundee in Los Angeles. The character is a crocodile hunter, hence the nickname and is modeled on Rod Ansell.

Dundee was supposedly born in a cave, in the Northern Territory, and raised by Indigenous Australians. He is unaware of his age; he once asked an Aboriginal elder when he was born, the reply was "in the summertime". Until the events of the first film, Dundee said he had never lived in a city, or even been to one. ("Cities are crowded right? If I went and lived in some city, I'd only make it worse.") He owns a piece of land called "Billongamick" ("belong to Mick"), meaning "Mick's place," that he inherited from an uncle. He estimates that a person might walk across it in three to four days, but he regards it as useless except for a gold mine that he refers to as "the Reserve Bank" and his "retirement fund." Dundee is rarely seen without his black Akubra hat or his Bowie knife.