Andrew,
I have tried sound recording of bird song in Hong Kong, I was trying to add another dimension to video's we produce. The main problem I came across was the ambient background noise - vehicles, piledrivers etc. I went to Pokfulam Country Park, to an area that I thought was quiet, but although I was using a professional (Senheisser) microphone with windshield, it was the construction work that was going on at the Peak that ruined the recording.
I believe it is fairly common overseas for birders to play back sounds of bird to attract the same species to come an investigate, just make sure you are not playing their warning alarm sounds.
Bob
PS. Regarding your problem of uploading to this site, try reducing the file size of the photo
PPS. If you live on Lamma disregard my comments on the noise problem
