**3. Olfactory learning behavior**

The appetitive associative behavior type is crucial in foragers' honeybee's species. The foragers' bees quickly learn to associate olfactory and visual stimuli with sugar solution/food reward, establishing a long-lasting remembrance of this association. Under controlled laboratory conditions, the worker bees can also remember/learn to respond to odor stimuli. In what has known as PER paradigm or proboscis extension response [20]. Usually, A bee harnessed in a metal or plastic tube learns to link a sucrose reward with an odor stimulation presented directly before the reward is given. Memory formation is evidenced when the harnessed bee extends its proboscis in response to the learned odor in anticipation of the sucrose reward. This form of classical conditioning has been successfully used to characterize multiple characteristics of associative learning and has shown potential in *Apis florea* and *Apis cerana* [21, 22].
