Friends, the expression on this yellow-rumped warbler appears as though he is mad.  I think it is the white eyebrows, but loved the feather details so excuse the extreme crop.  He was only a few feet away but he is a very small birdie.  A disclaimer, this was shot last spring with my old lens 100-400 mm Canon so I am comparing these results with the new telephoto 150-600 mm, I like the new lens better. til Tomorrow MJ