Squirrel-proof bird feeders?!

Sarah and I had a normalish day at work, then when I popped home before heading to my parents and then onto choir I spotted this through the patio windows (apologies for terrible photo). I thought hanging the non squirrel-proof feeders from the washing line would mean they couldn't reach them - well that's not the case for this determined squirrel, who jumped off, climbed the wall and took a flying leap every time he wanted to change his position!