Hello! im a S5 jungle mainer, ive been playing udyr since i got him( lev 17), i discovered his capality to take down allmost anyone with maximum speed. My mains are Udyr - attack speed and movement speed with a bit of tankiness, Master yi - Afk jungle and easy carry, Amumu - Amazing cc, ive been playing lol for about a half year and got this far.

Start 1 gromp - Blue - Wolves - Raptors - Red - Golems - Gank mid or bot. can gank top if pushed)
Start 2 Golems - Red - Raptors - Blue - Gromp - Wolves - Gank top or mid. Can Gank bot if pused)

Udyr, also known as The Godyr is one of the strongest junglers in this game, he isnt banned often so its a free pick, Udyr can get to enemies fast thx to his E and trinity force. His stun is the most hated thing about him, thats why he is so good in ganking, he stuns does tiger- or phoenix stance and with a little help of the laner you have a guranteed kill.

His q is Tiger stance, it gives you attack speed and massive damage.
His w is Turtle stance, it gives you a shield and lifesteal.
His e is bear stance, It gives you a stun on 1st hit and massive movement speed.
His r is Phoenix stance, it given you a burning hit in every 3 hit and a ring of fire.

Pros- High movement speed, High attack speed, STUN, High carry potential, Hart to catch up, tanky.
Cons- Can be Countered early, if behind hard to get back, can be kited, not much in teamfights