There is a breeze in the top of the trees.  Someone posted a comment about a man who charged his batteries during the depression by running an insulated wire up a tree.

The effect might be even stronger in the jungle keeping one end warm and the other end cooler (maybe down a well)

Got squirrels there Bill?  Some kind of jungle squirrel?  Monkeys?  Well we have squirrels all over the Northwest here and I'm cutting off the limbs that allow them to cross to the next tree, (tree limbs, not squirrel limbs) and installing fatty roap bridges from some old discarded marine line.

I'm going to connect them with really springy springs and then suspend more springy springs hanging down to lines leading to hanging magnets inside tube coils (the way the "forever flashlight" works) the magnet just slides back and forth through the coil when you shake it.

Photo source: http://www.thinkgeek.com/gadgets/lights/5a9f/zoom/

I know it will not be a lot of voltage but it will be consistant all day long, those squirrels are busy little guys and the magnets will be bobbing up and down through the coils (about 20 of them)  Then the voltage starts adding up.

Likewsie a few anchored floaters upstream from my pond waterfall will jiggle a magnet in a coil all day long Jungle Java,
No Troy I didn't make the freakin current or the squirrels!  Sucessfully put one back together though, when I decided it was best to go with cutting the tree limbs.

$#!+ Bill, I wanna live
in the jungle too!  Get me
out of here.  I'll increase
your coffee production by 25%
and limit my coffee consumption
to 50% if you introduce me to a
girl who looks like the actress
in the movie "Salvador"