I've been trying to play jungle, and I just noticed that I have Udyr since the season one and I still can't play with him.

I'd love to have some tips, if you guys can help me, and whatever... I know he is op, but I'd like to know when I should pick him and maybe which skills I should master first (I tried Q and W but everyone said I was doing it wrong).

And I tried to build an aggressive Udyr, but I didn't feel like I was doing it right.

Udyr can be a bit difficult if you're used to gap closers for ganking.

I like to build him as a mobile, tanky bruiser, using my R as my primary damage dealer.

With this in mind, I start R, maxing it first. My second skill is W for the early sustain, and third is E for ganking. I take and max Q last, since I only use it for pushing towers and inhibs(and for the AS boost in rotation with R while taking dragon and baron).

My runes are focused on Attack Speed to proc Phoenix more often, and MS to move around the jungle more quickly, and to stay in range for E procs when ganking and fighting. I use my AD focused jungle masteries, though a defence focused page should also be viable.

I start machete/5, backing for boots/wards/soulstone, and building mobility boots early. These significantly increase your ability to gank without burning flash, as well as allowing you to move around the map very quickly and apply pressure to all the lanes. Other key items are Wit's End, Phage(into Mallet or Triforce as desired), and Ancient Golem. I generally like to build tankier, since my damage comes from my R rather then my autoattacks, so items like Randuin's, Warmog's, and Spirit Visage are strong on Udyr. SR is also a good item, providing both cooldown, for switching stances more often, and a huge MS boost for initiating/chasing/retreating.

During my initial clear, I'll start R and rotate to W as soon as the R effect procs, then switch back to R as soon as it's up. I use E for initiating a gank, and I always try to gank from behind whenever possible. Lane ganks can be viable as well... basically, the closer you can get before you're noticed, the better. After landing a stun, I switch to R to deal damage while continuing to autoattack. I also reposition myself in the direction I expect the ganked champion to retreat in, so I have a headstart landing my next E, which I switch to as soon as I need to start chasing.

I pop W if I chase into tower range, take focus, or need to retreat myself, alternating it with E for the MS boost.

In teamfights, I like to alternate between E and R, alternatively stunning when I need to peel for a carry or CC a high value target, and dealing AoE damage with R to everyone around me.

This is what works for me... hope it helps you too.

Edit: After some thought, I've converted one of my spare Mastery pages to an Udyr specific page - whether it's viable or not will remain to be seen. I've taken AS, CDR, and damage amplification(Havoc) from Offense; Bladed Armor, HP Regen, Armor, and CC reduction(both Relentless and Tenacious) from Defense; and MS from Utility. I've also taken the enhancements for smite and flash.

Second Edit: Just went 10-1-4 =P Looks like that mastery page is viable.

Sereg has it basically right, but you need to find what works for you. Overall his build suggestions are on par with what I do, but I have found that I prefer to level my skills differently. For fast jungle clear R is yuour greatest asset and allows good dps in teamfights or bottom lane ganks. I suggest R / W / E / Q, and after your first 4 levels the order changes to R>W>Q>E. My reasoning behind this is that W is your sustain, and with any AP items, even Trinity, your shield will be a huge asset to survivability, and ultiamtely your sustain.

In S3, the jungle is unforgiving, so the longer you can stay in the jungle killing or offering ganks, the more increase in overall gold which is needed for all junglers nowadays. The reason that I level E last is that the changes to movement speed and the stun are not too significant, so all you really want is the stun imo. R provides you the ability to punish everyone, Q will allow you to hopefully take down the stunned champ, and W keeps you alive.

What Sereg put above in regards to positioning is a huge factor and key to successful ganks through the mid game, especially one a tower or two is down, on either side. Also, Either mobility boots are a huge benefit for junglers. I started running them for all junglers as it is amazing how fast you can get from top to bottom lane, and I can almost promise you at least 1 - 2 kills because they did not expect you to show up.

In terms of jungling, I place Udyr's clear time as a top 3 fastest, as I also know Skarner has insanely fast clear times. I say top 3 as many will disagree or argue, but pre level 6 I can argue back for either of those two champs. I only wish I picked up Udyr about a year earlier than I did.

Wow guys, thank you, this will help me a lot, I 'm still low elo, and I hear that one good way to get high elo is through the jungle.

I'll keep this in my mind, thank you !

I'm low elo too =P One good way to high elo is to be better then me, lol.

It's true that, as a jungler, you have the ability to pressure all the lanes and snowball your carries or shut down an enemy lane that's ahead, which means that, if you're jungling at a skill level significantly above the elo you're at, you'll probably climb a bit faster.

That has downsides, too, though - personally, since I've been maining jungle, I've risen to a point where my other roles are no longer viable, and I've gotten out of practice with them too. So in those games where I don't get to jungle, I'm at a bit of a disadvantage - so just be wary of that. Elo ultimately represents your overall skill, so climbing with a better then average role does have its drawbacks.

Jungle is fairly safe for that, as it's usually pretty easy to get the jungle role. Support should also be fairly safe. But god forbid you climbed with a solo lane, because those are not something you can expect to get every game.

The thing I enjoy about playing as Udyr is that he's one of the few champions with many different build paths to explore depending on your play style. That being said, I play him a little different from the others above me.

Personally, I max Tiger before maxing Phoenix simply because of the insane amount of damage you can put out in a single attack. It makes ganking a vulnerable lane all the more satisfying. Also, I max Turtle last (leaving Bear at Lv3) so that I can have that strong dueling potential in the beginning of the game as well as becoming a strong tank in the late game.

Runes: Flat AD Marks/Quints, Flat Armor Seals, MR/lvl Glyphs
Masteries: 0 - 27 - 3 (The 3 in utility is for the Wanderer mastery)

Start of the Game:
Buy: Machette + 5 HP Potions
Lv4 Jungle Path: Wolves -> Blue -> Wraiths -> Wolves -> Red -> Wraiths -> Look for a vulnerable lane or continue jungling.
Early Skill Order: Lv1-Phoenix, Lv2-Tiger, Lv3-Tiger, Lv4-Bear

Phoenix is the best skill for your initial clear of the Jungle, always take it first. When you get Lv2, take Tiger and head to the next camp. When you arrive, activate Phoenix and immediately use Tiger on the big minion of the camp. The added AD you get from Phoenix powers up Tiger so that it will do more damage, thus taking out the big minion quickly enough so you don't take a large amount of damage. Then switch back to Phoenix so you can deal some extra AoE damage to clear the camp. Continue clearing camps until you reach Lv4 and get Bear Stance. At this point, your movement speed will still be relatively low even with the active of Bear, so unless you see a really overextended enemy, you might want to just continue jungling. When you get 850 gold, go home and buy Boots of Speed and a Spirit Stone.

Early Game:
Core Buys: Boots of Mobility, Spirit of the Ancient Golem, Aegis of the Legion (Gold Value: 5550)
Skill Focus: Q>E(Lv3)>R>W

This is the part of the game where you really have to watch everyone's lanes while you travel from camp to camp. The laning phase is one of the most vital parts of the game, and if you can't reach your allies when in danger, then you're pretty much useless. Although my main focus is Tiger, leveling Bear periodically when Tiger isn't available allows you to reach your enemy faster before they can run away in fear. Every little bit of movement speed helps Udyr considering his biggest weakness is his lack of an immediate gap closer. Also, the best part I've found about taking Tiger before Phoenix is the amount of damage you can deal and still be tanky. You can build nothing but tank items all game long and Tiger's active will do significant damage to just about anyone.

Early to Mid Game Ganking:
Another thing I enjoy about Tiger stance. It's the only stance of Udyr that can be "loaded" and combined with his other stances and still be relevant when you reach your enemy. Like all of Udyr's stances, they have an active ability that remains even when you switch stances for a short while. Tiger is no different, except that you get the full effect of it if you reach your opponent in time. As soon as you decide to engage, activate Tiger and shortly there after, activate Bear to chase down your victim. When they get hit by your first attack, not only are they stunned by Bear but they took the full effect of Tiger's active as well! Continue the assault by switching into Phoenix and running alongside your fleeing enemy, letting the passive flames do their job. If you stop to attack, you may not be able to attack them again. As soon as Tiger is off cooldown again, activate it and hit them with a Phoenix empowered Tiger strike for even more damage! With your lane ally's help, you should net an easy kill.

Counter Jungling:
Make sure to periodically buy wards and place them in your opponent Blue and Red buff areas. If you notice the enemy jungle elsewhere on the map, sneak into their jungle and try to snipe a buff away from them. Constantly switching between Tiger and Phoenix makes quick work of the buff monster and your Boots of Mobility + Bear makes sure you get out of the enemy jungle as quickly as possible.

Mid-Late Game:
Situational Buys: Runic Bulwark, Randuin's Omen, Frozen Mallet, Iceborn Gauntlet, Trinity Force, Warmog's Armor, Frozen Heart, Spirit Visage, Blade of the Ruined King (So you can solo Baron xD ).

All things said, you're a tank built around the enemy damage dealers. Choose your final items depending on who is the most fed on the enemy team or if they're running multiple AP champs. When the fight happens, and you can't sustain the initial wave of attacks, you're useless. With no way to immediately close the gap in a team fight, you'll have to rely on your allies to poke them down as you dance around at the towers. However, when that big fight happens, make it your job to sprint toward the most vulnerable carry of your choice and simply bully them out of the fight so your team can clean up the rest. Your high HP/Armor/MR and natural sustain through Turtle stance should buy your team enough time to whittle their team down into a retreat. Also, Bear Stance's stun is useful versus champions who have channeled ultimate attacks such as Katarina, Galio, Miss Fortune, or Nunu just to name a few. A quick stun will render their most powerful ability useless, just be sure to save it for after they use the ability and not before. You're also very good at picking off stragglers on the enemy team. I do suggest you add either a Frozen Mallet or Iceborn Gauntlet to your build, but not both. Either way, when you catch up to them, they're not getting away and your team can capitalize on a crippled enemy team.

TL;DR: I enjoy using Tiger early on over using Phoenix early on because I think the lane ganking potential is much higher.

What does SR mean? is it a Shurelya's Reverie?