I think there cracks in the ground, which leads me to ask when that pic was taken as its not been that dry where i am for sometime now. If there is a carcass then there will be hair, tracks to and from (more than one that is). In africa Guides can relativly quickly ascertain which animal has killed a another based on these basic signs. I dont know why there is no more evidence then a solitary track. Unless its a one legged cat bouncing around like Tigger i dont understand the severe lack of evidence, iv seen many a big cat, majestic they are, also intelligant and capable of going undetected...sure, but Harashio Cane from CSI Miami they are not.