What is "tremble dance"

n. A dance performed by the honey bee in order to recruit more bees to collect nectar from the workers.

A tremble dance is a dance performed by forager honey bees of the species Apis mellifera to recruit more receiver honey bees to collect nectar from the workers.

The tremble dance was first described by Karl von Frisch in the 1920s (who was also first to describe the waggle dance), but no light was shed on its function until 1993 when Wolfgang Kirschner discovered that, when performed, the dance stopped nearby workers from flying to gather more nectar.

The tremble dance of the honeybee is similar to the waggle dance, but is used by a forager when the foraging bee perceives a long delay in unloading its nectar or a shortage of receiver bees, sometimes due to low numbers of receiver bees. It may also spread the scent released during the forager's waggle dance. Like the waggle dance, the tremble dance is likely one of two "primary regulation mechanisms" for regulating bee colony behavior at the group level, and one of four or five observed mechanisms known to be used by honeybees to change the task allocation among worker bees. The consumption of ethanol by foraging bees has been shown to increase the occurrence of the tremble dance while decreasing the occurrence of the waggle dance.