This was the only time I have ever fed them. I had just taken out a chicken fillet from the fridge and one of the kookaburras was watching me from outside and tapped on the window. I cut the fillet into very small pieces and as soon as I went outside I had 14 kookaburras on my deck and surrounds!
In this case it may be more useful when the data is extracted to have a count of 11 (or more if there are birds out of the frame), since 4-15 could be a fairly normal sighting if it was 4.