Greater spotted woodpecker

I happened to look out of the kitchen window the other day and was pleased to see a greater spotted woodpecker on the feeders. We have had woodpeckers in the garden before they seem to come in each day for a week or so and then disappear for a while. It had been quite some time since I'd seen one on the peanuts though so it was lovely to spot one again.  They are always very nervous of any movement though so I took this photo through the kitchen window which is then behind the conservatory. I knew I hadn't got much time so couldn't fiddle but just hope it would auto-focus through two panes of glass - or four if you could the double glazing!