Where’s Waldo Squirrel ??

So I was watching the squirrel family frolicking in the trees.  Snapped a few pictures and realized they were hard to spot against the winter bark.  It’s a family of four, but I could only catch 2 at a time. This shot has two (2); one in a polite side-view squat, and one perched full frontal, looking at me.   I decided not to provide you with any more written hints.   But so that you don’t go too crazy trying to find them, once you have given up, I placed red arrows on the ‘extra’.  
Have fun.