Might as well give my two cents.... Even though this topic hasn't been posted in for a while.
Don't know if many of you know about this, but it's actually been suggested that Deku Travel is a lot more difficult than one would first think. Well, at least for the Hylian Deku.
QUOTE
Soon, Lord Ganon's power
will change all of Hyrule's
forests into Lost Woods!
Once that happens, we'll be
able to travel freely!
QUOTE
Make sure that all who
enter the forest remain
here! Lord Ganon's orders!
But we're trying to build an
underground road that will
let us go anywhere...
Anyway, we've hidden
every single shovel we
could find!
If there are no holes, no
one will ever find our road.
We're absolutely brilliant!
QUOTE
Ah... I love darkness.
It's so soothing, so
relaxing.
This suggests that Deku Scrub cannot leave the shade, and prefer deep shadow over all. But then, we've seen Business Scrubs out of the shade, haven't we? And Deku Link didn't seem to have any problem at all going through the sunniest of areas.
It would seem Terminian Deku, and Business Scrubs in general are slightly more advanced than their brethren, which makes sense given the advanced Terminian culture and a Business Scrub's obviously more evolved form... But why can their kin not leave the shade of the Lost Woods?
I've got my own theories, but I'll leave this as is, for now. Oh, though, before this ends... One other thing.
QUOTE
The Lost Woods is our
birthplace!
If you wander lost here for
too long, you too can
become a Deku Scrub!
All of this info comes from my own playthrough of Four Swords Adventure, backed up by
this game script.