Savage bulldog ants of Australia which are large; in some cases almost an inch long, often colored in shades of red and with large eyes and jaws as equipped by those that live by the hunt.

Their tunnels extend deeply into the earth, sometimes to depths of four or more feet, they are known to be aggressive, and are found near the coastal areas of Australia.

One kind of bulldog ant, Myrmecia gulosa, often attacks and kills large beetles, and some kinds can jump a foot or more. They are also swimmers and do not hesitate to go into water.