In reply to McHeath:
>You have to be a bit careful with it if you don´t see the bird to confirm.
No doubt (and now I see that I should have read your first post!) but it has been a revelation to me with my very low base of bird knowledge and so far, where I have been able to confirm its claims, it has been right. I only think of it as making suggestions based on the recording but also (I guess, I haven't yet read much on it) on where I am, what time of day and year it is, what else I have heard etc, matched against some humungous database somewhere.