Some comment on telephoto from my experience this weekend at the Rhine, where you have the "Rheinauen" as a substitute to tropical rain-forest:
(1) 200mm is not really enough for the animals out there. Normally they are at a distance where you could easily need 400mm and above: Dragon flies, frogs, small reptiles, interesting flowers
(2) If you're lucky enough to have the interesting flora and fauna on your own path (not across at the other river bank), you should look for a decent macro, because again: your subjects turn out to be small. But take at least a 105mm macro, because most "things" are shy and don't allow you to get too close...
(3) If you're really zooming in on those small but interesting bugs, etc. carry a flash with you. You'll need all the light that you can get! That cannot be compensated for by a larger aperture (although most macros are at f2.8 and thus better positioned than the super-zoom at f4.0.
So forget about the "feeling" of a cam-body: It's the len(es) that count
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
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