I have not seen squirrels in the sculpture. I recently read in Science Daily, Personality matters, even for squirrels. The article is interesting as it is a window into the natural world. I expect these characteristics are valid in most species. I also found the availability of a perch important in creating a sculpture that supports urban wildlife. I have placed stumps in the garden
Squirrel study
Charcoal and ink
Squirrel study
Charcoal and ink
Squirrel movement study
Charcoal and ink