It is fine for ambient birdsong for nearby birds. Note that I put it on the bin to avoid handling noise and for this type of recording left it on max recording volume. Clearly if you want to plug in an external microphone in the future there is a socket between the built in mics. The instructions are simple and if you have problems lots of people use this recorder for all sorts of things so someone can answer any questions. Good value - simple - and popular. There are 'better' recorders out there, but as a starter model it ticks a lot of boxes.
It records to Micro sd/sdhc cards but a 2Gb comes with it - just checked.
Owners manual http://tascam.com/content/downloads/...r-05_om_vd.pdf
Full manual - if you need it: http://tascam.com/content/downloads/...r-05_rm_vc.pdf
There are lots of things that you don't need to know in these manuals so don't be put off - it really is simple to use.