The basic rule is that parrots have short tails and parakeets have long ones, much the same is true of lories and lorikeets: but there are some intermediates and there are probably exceptions too. Alan
Thanks for the advice everyone. Title now changed to moustached parakeet. There will be a couple more photos of the very very friendly inhabitants put on later,when I can figure out how to upload Iphone pics and enlarge and twist them.