As you see closely you could see some initial lines which are laided by saliva. The darker color are those saliva lines. There are so many marking and thru my experience there will be easily 5-6 nests will be formed at this area.
( gradually the lines become more and thicker then a cup shape will be formed)
In order to have such fast results the farms must also have a good micro environment, coupled with the Powerful Love Potion the growth rate of nests will increase.
( for those who had not seen swiftlet's initial nest marking before , above is the picture)
As I had mentioned before, Aroma is only one of the major factors in the micro environment that determine whether a farm fail or otherwise.
So the whole micro environment has to be good. When all these factors are good and well balanced then the farm will be successful.
With such good environment the numbers of nest will increase, bird's population increase and young birds will not leave for other farms.
( the nest making has spread to the right side, the whole intention was to spread the nest making thus increasing bird's population)