Australian Raven food caching

A few minutes ago, I observed an Australian Raven outside my office
window (Russell, ACT.)  It caught my eye because it appeared to be 
carrying a small egg in its beak.

I expected it to break open the egg and eat it; instead, it flew
down to the ground, carefully pushed the egg into the crushed scoria
and covered it, then placed a stone on top presumably as a marker.  

I hope its memory is better than mine, because I'm now not sure 
which of the various stones on the ground is the "X".

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
   Paul Taylor                           Veni, vidi, tici -
                    I came, I saw, I ticked.


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