Is there any data available if and how it is possible to identify different rodent species, in particular Muroidea, by the tracks they leave in the snow?
You can find useful indications in Morel J. 1996. Les traces d'animaux. Delachaux & Niestlé, Lausanne. The author indicates how taking plaster casts of animal traces on the snow using algenate for dentists + water to create a waterproof layer before proceeding with plaster cast. In this book there are also tables showing footprints for comparison.