Darwin in the backyard

I'm watching survival of the fittest unravel in my backyard.

I put out food for the squirrels as I think the cold took them by surprise.

There are two that I see often : 1 scrawny and patchy one and a healthy, robust one.

Photo of Scrawny one (from summer '06)
Photo of Healthy one

Each are after the food, and each have their tactics to drive the other off.

The scrawny one has no fear of me walking by the windows, where the healthy one bolts anytime he sees something move.

My cat, Spoon is an added wrinkle, wanting to kill and eat both of them.

Known killer evidence : Exhibit One | Exhibit Two | Exhibit Three

Results of the Darwinian smackdown are pending.