Deep in the Forest #7 - Intruder Alert

The intruder alarm went off at lunchtime today.
A quick inspection revealed this to be the culprit. I found it trying to scale the picket fence along the northern boundary.

I have now experimented for a week and have just about exhausted the posibilities without becoming monotonous.  I have one final image planned for tomorrow when I shall reveal what I did and maybe others will have their own ideas to try for themselves.