http://www.mobafire.com/league-of-legends/build/sxrs-in-depth-look-to-udyr-56684
All I can say is... "Wow." I did not expect such a truly fantastic guide when I clicked on this in the new builds section of Mobafire. The title holds true as this guide is EXTREMELY in depth. The author includes 5 builds for different ways to play udyr (phoenix dps soak, tiger dps soak, duality dps soak, tiger tank, phoenix tank), and on top of the builds he also has videos of his jungle routes as each build. He also discusses pros/cons to Triforce building, Ganking, Covering lanes, Survival Tips, Tanking Tips, DPSing tips, etc.
Look, I know there's already some really good Udyr guides out there, but this fulfills a lot of questions / methods untouched by other guides. It deserves a high rank. I'm not saying it's the best out there but it should definitely be up there for more players to see. I am sad it's not getting any love because the current top guide on Mobafire happens to be an Udyr guide, and this guide truly deserves our attention and respect
So please, give this build some love and attention. The author put so much work into it, and it shows. If you are trying to improve your Udyr (or even if you main Udyr!) it is a must-read.
-Mowen