Do kookaburras have distinct and recognizable markings?

Question

Is it possible to distinguish one from another?

Answer 1

They all look pretty much alike, mainly brown with black markings and a dark eye streak.  Their bellies and heads are a cream color and they have some blue in the wings.  

They can tell one another apart but likely more from their calls than from their appearance.

Answer 2

They can tell one another apart but we can't see the difference.