Bennett’s wallaby hindfoot.
The hind foot has a long middle toe and a small toe either side. Wallabies hop when moving at speed, making side-by-side hind feet prints only with usually only the front (toe) section of the foot makign an imprint. The longer heel part of the foot may be visible in footprints made at slower speeds, particularly on a soft surface, and sometimes the tail may leave a print too.
Photograph: by Mike Taylor