Incubated the idea for a while, then announced it.
The eagles still incubate, no sign of anything hatching.
The covered plate is allowed to incubate at a specific temperature (35°-37°C) for 24 to 48 hours to foster the growth of bacteria.
It may be allowed to incubate for up to ten hours at a time for improved flavor (the tartness of the yogurt increases with incubation time) and texture.
The latter pair were seen to dance before the (presumed) female settled down to incubate the egg.