Terrible Twins

These two were pestering the other birds around the feeder today.
  Very unusual really,as they are normally very placid creatures?
On a technical note! This is a classic shot to show shallow depth of focus.
 One of the problems with a long telephoto lens @ near wide open aperture.
As you can see? Two subjects about a foot apart.One is in focus,but the nearer one not!
   Realy does show up how critical focus can be!