Finally I managed to upload a few photos on Flickr. One by one, a real pain in the neck!
This is what I did with the window.
First picture, below, the window without any modification, huge and dangerous!
The two side panes are openable, and I needed to make it safe so that the birds wouldn't escape.
The centre pane is fixed so there wasn't need to do much for it.
These are the two side frames
That coloured square on the second picture is a little window cut in the mesh where I added a long sock. That way I can open the window putting my hand in the sock but the birds won't get out.
Today I am going to make a mesh door for that sock opening because it needs to be protected from those little crafty beaks.
The central part didn't need a screen so I just hanged a ladder made of mixed branches and sticks to it. Not very pretty
but my birds have not great taste themselves so they like it
Maybe I can avoid window stickers, the guys seem to completely avoid the two side mesh frames and concentrate on the middle side, sitting on the ladder.
If you are wondering what that bottle is, read the next post