MYSTERY SNOWPRINTS

The other night Graham was in bed, and was awoken by a telephone call. "There are some strange footprints in my garden" said a female voice. Graham gave her my email address and went back to sleep. The next day these arrived together with this message:

Hi Jon
I spoke to one of your colleagues tonight and wanted to send you these pics. As you can in some of the picture the size difference between my footprints and these. I hope you can give me some inside on these.

Thanks
Harriet and Amy

As you will all know by now, I am notoriously bad at identifying footprints. So it is over to you lot!