My experience of the H4 was that it was very prone to handling noise when using the
built-in mics. I imagine the same would be true of the H2 but I cannot vouch for this.
For clean handling noise free recordings a separate recorder (the H4 will do for
this) and a mic in a shockmounted cradle that you can hold (Rycote make good products in
this area) is probably best. You'll look like a bit of a fool wandering around the forest
with a big furry sausage held out in front of you but the sound will be much better (read:
free of handling noise).
For outside recordings (see this article on Outside
) you might like to consider a hypercardioid microphone but be weary of
phasey sounds if you move it around a lot.
There are dedicated 'fild recorders'
such as the Fostex FR2 (and now, FR2 LE) which are relatively expensive compared to the H4
but if this is just for project stuff, rather than professional recordings, then any
little field recorder with mic inputs will do.
Any word on budget or intended