How To Attract Green Woodpecker?

Hi there,

I recently have been hearing a lot of the green woodpeckers in my area, they fly over the garden and scream all the time but I can't seem to entice them down to feed.
So far I have only got to see a female on the lawn, we locked eyes and she scarpered very quickly, the only photographic evidence of their existence I have is this terrible image of her in thebackground of a trail camera video:

I've tried sprinkling seed on the floor, live morio worms in a dish on the floor (which get gobbled up by nuthatches and jays) and crushed suet balls.

I really like them and personally reckon theyre a bit cooler than the Great Spots, maybe because I'm used to seeing them almost everyday, so I'd love to see more of them.

Any help would be appreciated, thanks in advance, Jake