Editing Africanized bee (section)

=== Proboscis extension responses ===
Honey bee sensitivity to different concentrations of sucrose is determined by a reflex known as the proboscis extension response (PER). Different species of honey bees that employ different foraging behaviors will vary in the concentration of sucrose that elicits their proboscis extension response.<ref>{{Cite journal |doi=10.1007/s002650050664 |title=Response thresholds to sucrose predict foraging division of labor in honeybees |journal=Behavioral Ecology and Sociobiology |volume=47 |issue=4 |pages=265 |year=2000 |last1=Pankiw |first1=T. Jr. |last2=Page |first2=R.E.|bibcode=2000BEcoS..47..265P |s2cid=37726780 }}</ref>

For example, European honey bees (''Apis mellifera ligustica'') forage at older ages and harvest less pollen and more concentrated nectar. The differences in resources collected during harvesting are a result of the European honey bee's sensitivity to sucrose at higher concentrations.<ref name=Pankiw_2003/>