Observation recent and ancient tracks

The photo on the right was taken recently.

However, archaeologists or paleontologists, have discovered ancient fossilized tracks.

One such set of tracks are described in the National Geographic article: Incredible details of 10,000-year-old trek revealed in fossil footprints. The prints are inferred to be a prehistoric traveler who was carrying a child across a muddy landscape and returned a few hours later empty-handed.

Below are diagrams of even older animal tracks.

They are presented in three groups.

Observe each one, state your observations, and then make your inferrences about what might have happened all those years ago.