Track of the Week 1

I thought it might be fun to start a weekly tracking mystery segment on this blog. I'll post a picture and ask a question or three about it. Hopefully people will post their thoughts and questions in the comments. My intention is to post one every Monday.

This week's mystery:



Questions:
1. What species?
2. Which foot?

Additional information:
There has been a lot of great discussion in the comments, so I thought it would be helpful to include this picture with an expanded view of the trail.

Note: If you haven't looked at the comments yet and want to try and come up with an answer yourself, you might want to do so before checking out the comments. They quickly jumped beyond my questions, so I definitely recommend checking them out and posting your own thoughts and questions after you have taken whatever time you want pondering things yourself.