How to mic programs done in the field

["Jim Mooney" jmooney776]

Hi all,

Fairly new to this so please forgive if this is a simple question.  I=92ve =
been enjoying some natural history podcasts from the BBC lately.  Prime exa=
mple would be this one:

http://www.bbc.co.uk/programmes/b00vv5pn <http://www.bbc.co.uk/programmes/b=
00vv5pn>

My question is, how would you mic and with what types of mics for making a =
program like this?  It seems that a lot of natural history programs such as=
 Mr. Watson=92s fine work, are made by collecting the sounds and then addin=
g commentary in a studio.  But these BBC programs appear to be done out and=
 about.  I would guess the presenter and the guest are each miced because y=
ou don=92t seem to get the low audio at the instant someone begins talking =
as you would if they were passing a mic back and forth. 

Any insight would be appreciated.

Best,

Jim