Images on some Australian silver coins

I believe the answer is:

emus

(Other definitions for emus that I've seen before include "Running birds" , "laboratory units" , "Largest native Australian birds" , "Fast, but not high-fliers" , "Large flightless birds of Australia" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.