Sorry for the delay in answering the rest of your questions, you have not seen him fly. this dose not mean he cannot fly, If you look back to the posts of me and Beryl you will see that Beryl could fly but most of the time walked. I will put toys on the out side of the cage to encourage him to be out longer and have toys around the floor. Ok the sounds a ringneck makes. most will have the basic calls they use in the wild but many captive birds will o learnt other sounds and even speech. there are at least three distress calls and calls for attention or to attract other ringnecks, ringnecks do call whilst they are flying these are normally a series of three chirps then a gap and three chirps again but they also will call a single or double chirp at a second interval. I have said about how they acknowledge there name in my previous reply. if a bird is not happy with a situation for example another ringneck taking its food it will be more of a dull croaking chirp. You may get this if your bird is frightened of you approaching him if you do step back or slow down so your bird will settle. I will agree with your vet as far as the tong sticking out, it is a thing they have learnt, well it also shows me a little of the birds past life and that it has had a lot of attention from humans. I would say he has been around children as this is a common thing for three to seven year olds will do. I hope this answers most of your questions but one thing is your bird is not going to bite you hard if you approach it in a way that it dose not fill frightened. if he is unhappy with you getting close he will give a warning nip or distress call so just back up and talk to him gently. watch his eyes they can tell you a lot about there moods. be free to ask more questions