Dollar but not the currency type

This morning I was entertained by the Dollarbird and its preening.  It was also continuously calling out.  I was hoping that another one will turn up but none did.  I plan to stalk it out because it will certainly be a treat to spot a pair.
     This bird may look black from afar but it's not.  It has a rich glossy greenish-blue colour, brownish head and thick wide orangey-red bill.
     The Dollarbird likes flying insects and after doing sorties will return expectedly to the same or surrounding perch.  It also favours high perch on exposed bare branches of the tallest trees.

 This is a favourite perch position, and upright too, on the bare branch tip of the tallest tree, seen here continuously calling out.

The following image was shot about the same time last year.  It could be the same bird - stunning colour too!