Continued Interesting Behavior

For yet another year our smaller Passerines have exhibited hilarious behavior at the various nectar feeders.  That is, titmice and chickadees, especially, cling to the hanger post, invert themselves, and drink from the ant moat.  Just as if they have their own private water hole.  They do seem to prefer this to the bird bath and picked it up promptly with the return of the nectar feeders in April.  I wonder how far this behavior has spread.  When it started here a few years ago it seemed every bird adopted the stance!  So we have some proof there are very clever birds out there, and they can learn new behaviors.