Small, medium, large

The three dinosaurs are nicknamed after characters from a world-famous, Australian poet, Banjo Patterson, who composed the song Waltzing Matilda in Winton, where the fossils were found. In a quirky twist of fate, Waltzing Matilda describes the demise of a swag-man, who steals a jumbuck (sheep) but has to leap into a billabong (a small oxbow lake) to avoid being caught by the police. He then drowns in the billabong along with the sheep. 

Matilda and Banjo were found buried together in a 98-million-year-old billabong, although whether they died together or got stuck in the mud together remains a mystery; however, echoing the song, both predator and possible prey met their end at the bottom of a billabong.