He's an Indian Ring-neck Parakeet. They're from the topics around India and west with a sub-species native to east Africa. The wild color is mostly green, with blues, yellows and purple highlights if you look closely. The blue morph was introduced in captivity and is gaining popularity. It was really rare several years back (read: expensive) but it's quite common now. He's about 2 years old and has developed the black ring around his neck that the name implies. You can see a hint of it showing as a lighter ring in that pic. It's black now.
Anyway, that's the long answer, haha! They're great little birds. Do a search on youtube and you'l find videos of several other morphs talking and playing. My wife and I have 2 and an African Grey.