Misty now says a half-dozen words, some of which he taught himself. He doesn't combine them yet (except for "baby birdy"), but he seems to be enjoying talking more, and babbles with English sounds a lot. He also seems to understand "come out" because when I say it, he starts hopping excitedly from perch to perch. It's interesting to watch his talking ability evolve. I'm certain his speech will continue to improve. Considering that he was around a year old when he started to talk, he has made good progress!