For Nocturne, I build a very speedy champion to jungle with. This is because Nocturne is naturally fast, great at chasing/ganking, and can jungle very efficiently. With 100% crit chance, 2.5 attacks per second, and 215 AD, you are a force to be reckoned with in the jungle. Be careful though, you are squishy if you follow my final build. However, if you have a team set up like I do, you can take this Con out of the way because your team doesn't need you to be tanking. They need you to be damaging/Ganking/killing those red and blue buffs.

The team can't do this without you, and without communication, you are a weight that is bringing down the team. Be ready to gank, ask when to engage, and when to stay back. if possible, get a few friends to play consistently with. The more you know each other and your play-styles, the better the communication is. I recommend using a chat source such as skype or ventrillo so you can talk to your team, not type. I hate typing, it is slow, and you can't be alert and ready 100% of the time.

Jungling is the act of taking your Summoner Spell #1 as smite and taking out the neutral mobs in the jungle, while performing ganks and grabbing/ aiding the acquiring of Blue/Red Buffs.