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Are there any pics of these greens?
Or are they just the same greens of the haemonculi that's been doing the rounds?

http://www.labibliotecanegra.net/

Fixed your link.
Not sure how to fix your problem, but ta for the link. The maps will come in handy.

Did he mention where he saw them?

Agreed. The nid dex is definitely one of the books fomr 4th that is still very playable in 5th.
Some things need to be tweaked, like KP for spore mines and things like that.
Top of my wishlist ould...

Been playing Tyranids since 2nd ed.
Currently sitting with roughly 6000pts worth...
Unfortunately all my little plastic children are currenty in storage whilst I'm working abroad.

A local record store had a copy of a Bolt Thrower album on CD.
Unfortunately the stupid shop had closed down when I managed to make it back there with cash to pick it up.
:(