equipment questions

["June Newman" lovebirdsandbugs]

I'm a birder in Missouri, USA. I want to be able to record bird calls
in the field that are adequate for species identification.   I'd like
to be able to share digital files with other birders for
identification help.  I use a MacBook, OS X 10.4.  Please make
suggestions for recorder and mic and software (if needed), starting
with the least expensive items that will do what I want, and not be
frustrating for a moderately patient non-techie.

June Newman