I believe that, that DEFINATLY looks like a fox. I have seen a lot of fox and that definatly looks like one. Fox do have pretty long thin legs...
Here's some pics

very thin fox
http://pinker.wjh.harvard.edu/photos...in%20grass.jpg

http://estes.on-line.com/wildwatch/Images/Fox.JPG

pretty good pic of one
http://web.mit.edu/emsque/www/Chile/...ious%20Fox.JPG