Spider-man, spider-pig, now spider-squirrel

We have a bird feeder stuck to our window. It is squirrel proof because there is nothing to grip onto around the feeder. The squirrel didn't know this - fell off at the first attempt, but succeeded on the second.

As you can see, he squashed his fury little butt into the feeder and started eating all our Robbin-food. Blighter!