When it comes to measuring paw prints, or "pugmarks", there can be some overlap between adult leopards and young tigers. According to a 2005 Pugmark Guide, plushed by WWF - India,
We've been able to identify many species in the project area, coexisting with villagers. We also believe that a few species, such as the nalgai antelope, which have never been recorded in the area, are also present. We hope to confirm nalgai antelope and other species never recorded in this region of Nepal.
Every little bit helps and it will all go towards a worthy cause.