Dalat birding

This morning I did some birding trip to mountains near Dalat - It got rainy (really rainy) and I had to stop it to short, but nevertheless I managed to find some interesting birds (for me) like viatnamese crossbills and greenfinches and many unrecognized ones. I really wonder how can one actually recognise all the birds (or even most of them) - to me it is mission impossible to recognise all the voices or looks of the birds by seeing them second or two. Regardless of this I really enjoyed this wet birding trip....