[Rumil]

Good points above,

certainly Middle Earth is ridiculously sparsely populated, as far as we're aware. Basically the Prof was no Ecologist, Economist nor Geographer!

I think that Haldir is refering to Legolas and the Mirkwood elves as 'our Northern kin' so don't see this as an indication of a sundered Lorien. Likewise no evil Halflings!

Yes I overstated the relationship of the two Forests as 'Allies', but, hooom, neither Treebeard nor Celeborn are what you'd call 'hasty' with their information. The Ents did indeed act as allies of Lothlorien (and Rohan of course) in destroying the orcish army from Dol Guldur out on the Wold after it had been repelled from Laurelindorenan. Whether this was in cahoots with C&G or completely independently is not stated.