What has caught their attention?

A discussion on the APF forum I belong to was about what was holding the attention of these kookaburras?  Usually when there are a number together they are looking in different directions for food but not all in the same direction and not usually up either.

There was the most gorgeous sunrise yesterday and I spied these three all looking towards the sun as it rose. You can see the glint on the trees in the background.  But would birds watch a sunrise? What do you suppose they were all watching?