“You can catch more flies with honey than with vinegar.”

The saying that one can catch more flies with honey than with vinegar is a well-known proverb with a history stretching back centuries. Its earliest recorded appearance in print can be traced to Giovanni Torriano's 1666 "Common Place of Italian Proverbs," and it gained further popularity in the United States through Benjamin Franklin's "Poor Richard's Almanack" in 1744. While often used metaphorically to suggest that a kind and gentle approach is more effective in persuading others than harshness or aggression, the adage also holds a literal, scientific truth about insects.

From a biological perspective, many common types of flies are indeed drawn to the sweet, sugary content of honey, which serves as a readily available energy source. The sticky consistency of honey also acts as a natural trap, ensnaring flies that come into contact with it. In contrast (Review), while fruit flies are notably attracted to the acetic acid found in vinegar—a signal of fermenting fruit for feeding and laying eggs—this attraction is specific to certain species and dependent on concentration. For a broader range of flies, the universal appeal of sweetness often outweighs the more specialized attraction to fermentation byproducts.

Historically, the effectiveness of sweet substances as fly bait (Review) has been widely recognized. For centuries, honey and sugar water have been employed in various forms