After the mystery of the catbirds attacking the squirrels, more evidence has come to light. No eggs in the Cardinal's nest (we never could find the catbird nest). So, C put her trapper hat back on and we are now an island less two squirrels. That leaves two--but one may have taken a powder on his own. The female is still here, but she has become a pet.
It is amazing that a squirrel--who has seen his buddy in a trap just the day before, can walk into the same trap and get caught (these are live traps, remember). They just can't control their impulses--a lesson to us all!
We are now an island with two squirrels instead of four. This seems to be the magic number for our little ecosystem--which allows a rough harmony between squirrels and birds.