Question from an "arm-chair hack"

[The LightKeeper]

Assumptions I'm using:
Ebola is a "jungle virus."  The outbreaks have all occured in or
around remote parts of Africa.  (excepting Reston, granted)  

No one has found a resivoir for Ebola.  No fields of dead jungle
creatures or the like.  

<begin suppositions>

Ebola is NOT primarily a human virus.  Human populations don't
sustain it. 

Ebola is far too nasty to its human victims to survive evolution
(so it seems) as a human virus.  Even lower primates seem overly
affected by it.

<point>
Heres the thing: If Ebola was so amazingly nasty, and has such a
tremendous mortality, why AREN'T there fields of dead jungle
creatures?  If in a short time HUNDREDS of humans die from this
thing, why are the monkey populations of Africa gone by now.
Surely monkey colonies observe no quarentines, surely they would
be more in contact with the virus than we.  Why is this? 

-Lighty 
(arm-chair hack to the stars)